diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..73f69e0
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/
diff --git a/build.gradle b/build.gradle
new file mode 100644
index 0000000..5d1261c
--- /dev/null
+++ b/build.gradle
@@ -0,0 +1,20 @@
+plugins {
+    id 'java'
+}
+
+group 'org.example'
+version '1.0-SNAPSHOT'
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    testImplementation platform('org.junit:junit-bom:5.9.1')
+    testImplementation 'org.junit.jupiter:junit-jupiter'
+    testImplementation "org.assertj:assertj-core:3.25.3"
+}
+
+test {
+    useJUnitPlatform()
+}
\ No newline at end of file
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..7454180
Binary files /dev/null and b/gradle/wrapper/gradle-wrapper.jar differ
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..e411586
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.4-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..744e882
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MSYS* | MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..107acd3
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle b/settings.gradle
new file mode 100644
index 0000000..3a4a665
--- /dev/null
+++ b/settings.gradle
@@ -0,0 +1,2 @@
+rootProject.name = 'java-baseball'
+
diff --git a/src/main/java/baseball/Application.java b/src/main/java/baseball/Application.java
new file mode 100644
index 0000000..99cf5b9
--- /dev/null
+++ b/src/main/java/baseball/Application.java
@@ -0,0 +1,8 @@
+package baseball;
+
+
+public class Application {
+    public static void main(String[] args) throws IllegalAccessException {
+        BaseballGame.launch();
+    }
+}
diff --git a/src/main/java/baseball/BaseballGame.java b/src/main/java/baseball/BaseballGame.java
new file mode 100644
index 0000000..b48c9da
--- /dev/null
+++ b/src/main/java/baseball/BaseballGame.java
@@ -0,0 +1,56 @@
+package baseball;
+
+import static java.util.UUID.randomUUID;
+
+import baseball.domain.Computer;
+import baseball.domain.ComputerDigit;
+import baseball.domain.UserDigit;
+import baseball.presentation.GameManager;
+import baseball.domain.Referee;
+import baseball.presentation.GameStatus;
+import baseball.presentation.MessagePrinter;
+import baseball.presentation.RandomNumberGenerator;
+import baseball.presentation.input.Input;
+import baseball.presentation.input.InputProvider;
+
+import java.util.List;
+import java.util.Scanner;
+
+public class BaseballGame {
+
+    public static void launch() throws IllegalAccessException {
+        final Computer computer = new Computer(new RandomNumberGenerator());
+        final Referee referee = new Referee();
+        final InputProvider inputProvider = new Input(new Scanner(System.in));
+        final GameManager gameManager = new GameManager(new MessagePrinter(), inputProvider);
+
+        boolean isApplicationOver = false;
+        while (!isApplicationOver) {
+            GameStatus gameStatus = gameManager.init();
+            String gameId = randomUUID().toString();
+            ComputerDigit computerDigit = null;
+
+            if (gameStatus.equals(GameStatus.START)) {
+                List<Integer> computerDigits = gameManager.getComputerDigits(computer);
+                computerDigit = new ComputerDigit(gameId, computerDigits);
+
+            } else if (gameStatus.equals(GameStatus.QUIT)) {
+                gameManager.applicationOver();
+            }
+
+            boolean isOut = false;
+            int tryCount = 0;
+            while (!isOut) {
+                tryCount++;
+                List<Integer> userDigits = gameManager.getUserDigits();
+                UserDigit userDigit = new UserDigit(gameId, tryCount, userDigits);
+
+                isOut = referee.judge(computerDigit, userDigit);
+                String callMessage = referee.getCallMessage();
+                gameManager.call(callMessage);
+            }
+
+            gameManager.gameOver();
+        }
+    }
+}
diff --git a/src/main/java/baseball/common/exception/InvalidGameStatusException.java b/src/main/java/baseball/common/exception/InvalidGameStatusException.java
new file mode 100644
index 0000000..8928635
--- /dev/null
+++ b/src/main/java/baseball/common/exception/InvalidGameStatusException.java
@@ -0,0 +1,10 @@
+package baseball.common.exception;
+
+public class InvalidGameStatusException extends Exception{
+
+    private static final String MESSAGE = "1(시작) 또는 9(종료)를 눌러주세요.";
+
+    public InvalidGameStatusException() {
+        super(MESSAGE);
+    }
+}
diff --git a/src/main/java/baseball/common/exception/InvalidLengthException.java b/src/main/java/baseball/common/exception/InvalidLengthException.java
new file mode 100644
index 0000000..cb63b53
--- /dev/null
+++ b/src/main/java/baseball/common/exception/InvalidLengthException.java
@@ -0,0 +1,10 @@
+package baseball.common.exception;
+
+public class InvalidLengthException extends Exception{
+
+    private static final String MESSAGE = "자리 숫자만 가능합니다.";
+
+    public InvalidLengthException(int length) {
+        super(String.valueOf(length) + MESSAGE);
+    }
+}
diff --git a/src/main/java/baseball/common/exception/InvalidNumberException.java b/src/main/java/baseball/common/exception/InvalidNumberException.java
new file mode 100644
index 0000000..1a7d559
--- /dev/null
+++ b/src/main/java/baseball/common/exception/InvalidNumberException.java
@@ -0,0 +1,10 @@
+package baseball.common.exception;
+
+public class InvalidNumberException extends Exception{
+
+    private static final String MESSAGE = "서로 다른 숫자만 가능합니다.";
+
+    public InvalidNumberException() {
+        super(MESSAGE);
+    }
+}
diff --git a/src/main/java/baseball/common/utils/converter.java b/src/main/java/baseball/common/utils/converter.java
new file mode 100644
index 0000000..763ea49
--- /dev/null
+++ b/src/main/java/baseball/common/utils/converter.java
@@ -0,0 +1,19 @@
+package baseball.common.utils;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class converter {
+
+    /**
+     *  int를 맨 앞 자리부터 하나씩 리스트로 변환
+     */
+    public static List<Integer> intToDigits(int number) {
+        List<Integer> digits = new ArrayList<>();
+        while (number > 0) {
+            digits.add(0, number % 10);
+            number /= 10;
+        }
+        return digits;
+    }
+}
diff --git a/src/main/java/baseball/domain/CallResult.java b/src/main/java/baseball/domain/CallResult.java
new file mode 100644
index 0000000..9810cc4
--- /dev/null
+++ b/src/main/java/baseball/domain/CallResult.java
@@ -0,0 +1,19 @@
+package baseball.domain;
+
+public enum CallResult {
+
+    BALL_CALL("볼"),
+    STRIKE_CALL("스트라이크"),
+    NOTHING_CALL("낫싱")
+    ;
+
+    private final String description;
+
+    CallResult(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}
diff --git a/src/main/java/baseball/domain/Computer.java b/src/main/java/baseball/domain/Computer.java
new file mode 100644
index 0000000..ee38729
--- /dev/null
+++ b/src/main/java/baseball/domain/Computer.java
@@ -0,0 +1,32 @@
+package baseball.domain;
+
+import baseball.presentation.NumberGenerator;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Computer {
+
+    private static final int COMPUTER_DIGITS_SIZE = 3;
+    private final NumberGenerator randomNumberGenerator;
+
+
+    public Computer(NumberGenerator randomNumberGenerator) {
+        this.randomNumberGenerator = randomNumberGenerator;
+    }
+
+    public List<Integer> generateRandomDigits() {
+        List<Integer> digits = new ArrayList<>();
+
+        while (digits.size() < COMPUTER_DIGITS_SIZE) {
+            addToDigits(digits, randomNumberGenerator.generate());
+        }
+
+        return digits;
+    }
+
+    private void addToDigits(List<Integer> digits, int randomNumber) {
+        if (!digits.contains(randomNumber)) {
+            digits.add(randomNumber);
+        }
+    }
+}
diff --git a/src/main/java/baseball/domain/ComputerDigit.java b/src/main/java/baseball/domain/ComputerDigit.java
new file mode 100644
index 0000000..6a0040f
--- /dev/null
+++ b/src/main/java/baseball/domain/ComputerDigit.java
@@ -0,0 +1,34 @@
+package baseball.domain;
+
+import java.util.List;
+
+public class ComputerDigit {
+
+    private final String gameId;
+    private final int firstNumber;
+    private final int secondNumber;
+    private final int thirdNumber;
+
+    public ComputerDigit(String gameId, List<Integer> digits) {
+        this.gameId = gameId;
+        this.firstNumber = digits.get(0);
+        this.secondNumber = digits.get(1);
+        this.thirdNumber = digits.get(2);
+    }
+
+    public String getGameId() {
+        return gameId;
+    }
+
+    public int getFirstNumber() {
+        return firstNumber;
+    }
+
+    public int getSecondNumber() {
+        return secondNumber;
+    }
+
+    public int getThirdNumber() {
+        return thirdNumber;
+    }
+}
diff --git a/src/main/java/baseball/domain/Referee.java b/src/main/java/baseball/domain/Referee.java
new file mode 100644
index 0000000..2b65643
--- /dev/null
+++ b/src/main/java/baseball/domain/Referee.java
@@ -0,0 +1,77 @@
+package baseball.domain;
+
+import java.util.List;
+
+import static baseball.domain.CallResult.*;
+
+public class Referee {
+
+    private static final String SPACE_CHARACTER = " ";
+    private static final int INIT_COUNT = 0;
+    private static final int OUT_COUNT = 3;
+
+    private int ballCount = INIT_COUNT;
+    private int strikeCount = INIT_COUNT;
+
+    public boolean judge(ComputerDigit computerDigit, UserDigit userDigit) throws IllegalAccessException {
+        if (!computerDigit.getGameId().equals(userDigit.getGameId())) {
+            throw new IllegalAccessException("gameId가 일치하지 않습니다.");
+        }
+
+        resetCounts();
+        compareDigits(
+                List.of(computerDigit.getFirstNumber(), computerDigit.getSecondNumber(), computerDigit.getThirdNumber()),
+                List.of(userDigit.getFirstNumber(), userDigit.getSecondNumber(), userDigit.getThirdNumber())
+        );
+        return isOut();
+    }
+
+    public String getCallMessage() {
+        String callMessage = generateCallMessage();
+        if (callMessage.isEmpty()) {
+            callMessage = NOTHING_CALL.getDescription();
+        }
+        return callMessage;
+    }
+
+    private void resetCounts() {
+        ballCount = INIT_COUNT;
+        strikeCount = INIT_COUNT;
+    }
+
+    private void compareDigits(List<Integer> computerDigits, List<Integer> userDigits) {
+        for (int index = 0; index < computerDigits.size(); index++) {
+            countBallOrStrike(computerDigits, userDigits, index);
+        }
+    }
+
+    private void countBallOrStrike(List<Integer> computerDigits, List<Integer> userDigits, int index) {
+        Integer userDigit = userDigits.get(index);
+        Integer computerDigit = computerDigits.get(index);
+        if (userDigit.equals(computerDigit)) {
+            strikeCount++;
+        } else if (computerDigits.contains(userDigit)) {
+            ballCount++;
+        }
+    }
+
+    private boolean isOut() {
+        return strikeCount == OUT_COUNT;
+    }
+
+    private String generateCallMessage() {
+        StringBuilder call = new StringBuilder();
+        if (ballCount != INIT_COUNT) {
+            call.append(ballCount)
+                    .append(BALL_CALL.getDescription())
+                    .append(SPACE_CHARACTER);
+        }
+
+        if (strikeCount != INIT_COUNT) {
+            call.append(strikeCount)
+                    .append(STRIKE_CALL.getDescription());
+        }
+
+        return call.toString().trim();
+    }
+}
diff --git a/src/main/java/baseball/domain/UserDigit.java b/src/main/java/baseball/domain/UserDigit.java
new file mode 100644
index 0000000..286e884
--- /dev/null
+++ b/src/main/java/baseball/domain/UserDigit.java
@@ -0,0 +1,42 @@
+package baseball.domain;
+
+import java.util.List;
+
+public class UserDigit {
+
+    private final String gameId;
+    private final int tryCount;
+    private final int firstNumber;
+    private final int secondNumber;
+    private final int thirdNumber;
+
+    public UserDigit(String gameId, int tryCount, List<Integer> digits) {
+        this.gameId = gameId;
+        this.tryCount = tryCount;
+        this.firstNumber = digits.get(0);
+        this.secondNumber = digits.get(1);
+        this.thirdNumber = digits.get(2);
+    }
+
+    public String getGameId() {
+        return gameId;
+    }
+
+    public int getTryCount() {
+        return tryCount;
+    }
+
+    public int getFirstNumber() {
+        return firstNumber;
+    }
+
+    public int getSecondNumber() {
+        return secondNumber;
+    }
+
+    public int getThirdNumber() {
+        return thirdNumber;
+    }
+}
+
+
diff --git a/src/main/java/baseball/presentation/FixedNumberGenerator.java b/src/main/java/baseball/presentation/FixedNumberGenerator.java
new file mode 100644
index 0000000..acb0997
--- /dev/null
+++ b/src/main/java/baseball/presentation/FixedNumberGenerator.java
@@ -0,0 +1,9 @@
+package baseball.presentation;
+
+public class FixedNumberGenerator implements NumberGenerator {
+
+    @Override
+    public int generate() {
+        return 1;
+    }
+}
diff --git a/src/main/java/baseball/presentation/GameManager.java b/src/main/java/baseball/presentation/GameManager.java
new file mode 100644
index 0000000..92afbff
--- /dev/null
+++ b/src/main/java/baseball/presentation/GameManager.java
@@ -0,0 +1,93 @@
+package baseball.presentation;
+
+import baseball.domain.Computer;
+import baseball.common.exception.InvalidLengthException;
+import baseball.common.exception.InvalidNumberException;
+import baseball.presentation.input.InputProvider;
+
+import java.util.*;
+
+import static baseball.common.utils.converter.intToDigits;
+
+
+public class GameManager {
+
+    private static final int USER_DIGITS_SIZE = 3;
+
+    private final MessagePrinter messagePrinter;
+    private final InputProvider inputProvider;
+
+    public GameManager(MessagePrinter messagePrinter, InputProvider inputProvider) {
+        this.messagePrinter = messagePrinter;
+        this.inputProvider = inputProvider;
+    }
+
+    public GameStatus init() {
+        GameStatus gameStatus;
+        do {
+            try {
+                messagePrinter.initMessage();
+                String input = inputProvider.getInput();
+                gameStatus = GameStatus.find(input);
+                break;
+            } catch (Exception e) {
+                messagePrinter.errorMessage(e.getMessage());
+            }
+        } while (true);
+
+        return gameStatus;
+    }
+
+    public List<Integer> getUserDigits() {
+        List<Integer> userDigits;
+        do {
+            try {
+                messagePrinter.inputNumberMessage();
+                String input = inputProvider.getInput();
+                int userNumber = Integer.parseInt(input);
+                userDigits = intToDigits(userNumber);
+
+                validateLength(userDigits);
+                validateDuplication(userDigits);
+
+                break;
+            } catch (Exception e) {
+                messagePrinter.errorMessage(e.getMessage());
+            }
+        } while (true);
+        return userDigits;
+    }
+
+    public List<Integer> getComputerDigits(Computer computer) {
+        List<Integer> digits = computer.generateRandomDigits();
+        messagePrinter.computerSelectionMessage();
+        return digits;
+    }
+
+    public void call(String callString) {
+        messagePrinter.judgeMessage(callString);
+    }
+
+    public void gameOver() {
+        messagePrinter.userWinMessage();
+        messagePrinter.gameOverMessage();
+    }
+
+    public void applicationOver() {
+        messagePrinter.applicationOverMessage();
+        System.exit(0);
+    }
+
+    private void validateLength(List<Integer> digits) throws InvalidLengthException {
+        if (digits.size() != USER_DIGITS_SIZE) {
+            throw new InvalidLengthException(USER_DIGITS_SIZE);
+        }
+    }
+
+    private void validateDuplication(List<Integer> digits) throws InvalidNumberException {
+        Set<Integer> digitSet = new HashSet<>(digits);
+        if (digitSet.size() != USER_DIGITS_SIZE) {
+            throw new InvalidNumberException();
+        }
+    }
+}
diff --git a/src/main/java/baseball/presentation/GameStatus.java b/src/main/java/baseball/presentation/GameStatus.java
new file mode 100644
index 0000000..76d0046
--- /dev/null
+++ b/src/main/java/baseball/presentation/GameStatus.java
@@ -0,0 +1,35 @@
+package baseball.presentation;
+
+import baseball.common.exception.InvalidGameStatusException;
+
+import java.util.Collections;
+import java.util.Map;
+import java.util.Optional;
+import java.util.function.Function;
+import java.util.stream.Collectors;
+import java.util.stream.Stream;
+
+public enum GameStatus {
+
+    START("1"),
+    QUIT("9");
+
+    private final String description;
+    private static final Map<String, GameStatus> descriptions =
+            Collections.unmodifiableMap(Stream.of(GameStatus.values())
+                    .collect(Collectors.toMap(GameStatus::getDescription, Function.identity())));
+
+    GameStatus(String description) {
+        this.description = description;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+
+    public static GameStatus find(String description) throws InvalidGameStatusException {
+        return Optional.ofNullable(descriptions.get(description)).orElseThrow(
+                () -> new InvalidGameStatusException()
+        );
+    }
+}
diff --git a/src/main/java/baseball/presentation/MessagePrinter.java b/src/main/java/baseball/presentation/MessagePrinter.java
new file mode 100644
index 0000000..1353ca3
--- /dev/null
+++ b/src/main/java/baseball/presentation/MessagePrinter.java
@@ -0,0 +1,36 @@
+package baseball.presentation;
+
+public class MessagePrinter {
+
+    public void initMessage() {
+        System.out.println("게임을 새로 시작하려면 1, 종료하려면 9를 입력하세요.");
+    }
+
+    public void computerSelectionMessage() {
+        System.out.println("컴퓨터가 숫자를 뽑았습니다.");
+    }
+
+    public void inputNumberMessage() {
+        System.out.println("숫자를 입력해주세요 : ");
+    }
+
+    public void userWinMessage() {
+        System.out.println("3개의 숫자를 모두 맞히셨습니다.\n");
+    }
+
+    public void gameOverMessage() {
+        System.out.println("-------게임 종료-------\n");
+    }
+
+    public void applicationOverMessage() {
+        System.out.println("애플리케이션이 종료되었습니다.");
+    }
+
+    public void errorMessage(String errorMessage) {
+        System.out.println(errorMessage);
+    }
+
+    public void judgeMessage(String callString) {
+        System.out.println(callString);
+    }
+}
diff --git a/src/main/java/baseball/presentation/NumberGenerator.java b/src/main/java/baseball/presentation/NumberGenerator.java
new file mode 100644
index 0000000..8aeae7b
--- /dev/null
+++ b/src/main/java/baseball/presentation/NumberGenerator.java
@@ -0,0 +1,6 @@
+package baseball.presentation;
+
+public interface NumberGenerator {
+
+    int generate();
+}
diff --git a/src/main/java/baseball/presentation/RandomNumberGenerator.java b/src/main/java/baseball/presentation/RandomNumberGenerator.java
new file mode 100644
index 0000000..218f8d2
--- /dev/null
+++ b/src/main/java/baseball/presentation/RandomNumberGenerator.java
@@ -0,0 +1,13 @@
+package baseball.presentation;
+
+import java.util.Random;
+
+public class RandomNumberGenerator implements NumberGenerator {
+
+    private Random random = new Random();
+
+    @Override
+    public int generate() {
+        return random.nextInt(9) + 1;
+    }
+}
diff --git a/src/main/java/baseball/presentation/input/Input.java b/src/main/java/baseball/presentation/input/Input.java
new file mode 100644
index 0000000..dd152d1
--- /dev/null
+++ b/src/main/java/baseball/presentation/input/Input.java
@@ -0,0 +1,17 @@
+package baseball.presentation.input;
+
+import java.util.Scanner;
+
+public class Input implements InputProvider {
+
+    private final Scanner scanner;
+
+    public Input(Scanner scanner) {
+        this.scanner = scanner;
+    }
+
+    @Override
+    public String getInput() {
+        return scanner.nextLine();
+    }
+}
diff --git a/src/main/java/baseball/presentation/input/InputProvider.java b/src/main/java/baseball/presentation/input/InputProvider.java
new file mode 100644
index 0000000..3386fd5
--- /dev/null
+++ b/src/main/java/baseball/presentation/input/InputProvider.java
@@ -0,0 +1,5 @@
+package baseball.presentation.input;
+
+public interface InputProvider {
+    String getInput();
+}
diff --git a/src/test/java/baseball/common/utils/converter/converterTest.java b/src/test/java/baseball/common/utils/converter/converterTest.java
new file mode 100644
index 0000000..2206716
--- /dev/null
+++ b/src/test/java/baseball/common/utils/converter/converterTest.java
@@ -0,0 +1,25 @@
+package baseball.common.utilsr;
+
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static baseball.common.utils.converter.intToDigits;
+import static org.assertj.core.api.Assertions.assertThat;
+
+class converterTest {
+
+
+    @Test
+    void int타입의_숫자를_한자리씩_리스트로_변환한다() {
+        // given
+        int input = 123;
+        List<Integer> expected = List.of(1, 2, 3);
+
+        // when
+        List<Integer> actual = intToDigits(input);
+
+        // then
+        assertThat(actual).isEqualTo(expected);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/baseball/domain/ComputerTest.java b/src/test/java/baseball/domain/ComputerTest.java
new file mode 100644
index 0000000..ef6c35a
--- /dev/null
+++ b/src/test/java/baseball/domain/ComputerTest.java
@@ -0,0 +1,78 @@
+package baseball.domain;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import baseball.presentation.FixedNumberGenerator;
+import baseball.presentation.NumberGenerator;
+import baseball.presentation.RandomNumberGenerator;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.TimeUnit;
+import org.junit.jupiter.api.Test;
+import java.util.List;
+
+class ComputerTest {
+
+    private NumberGenerator randomNumberGenerator = new RandomNumberGenerator();
+    private NumberGenerator fixedNumberGenerator = new FixedNumberGenerator();
+
+    private Computer computer = new Computer(randomNumberGenerator);
+
+    @Test
+    void 길이를_검증한다() {
+        // when
+        List<Integer> result = computer.generateRandomDigits();
+
+        // then
+        assertThat(result.size()).isEqualTo(3);
+    }
+
+    @Test
+    void 중복을_검증한다() {
+        // when
+        List<Integer> result = computer.generateRandomDigits();
+
+        // then
+        assertThat(result).doesNotHaveDuplicates();
+    }
+
+    @Test
+    void 랜덤_숫자생성기를_주입받으면_숫자생성이_정상완료된다() throws InterruptedException {
+        // given
+        CountDownLatch latch = new CountDownLatch(1);
+        Thread testThread = new Thread(() -> {
+            try {
+                computer.generateRandomDigits();
+            } finally {
+                latch.countDown();
+            }
+        });
+
+        // when
+        testThread.start();
+
+        // then
+        boolean result = latch.await(1, TimeUnit.SECONDS);
+        assertThat(result).isTrue();
+    }
+
+    @Test
+    void 고정된_숫자생성기를_주입받으면_무한루프에_빠진다() throws InterruptedException {
+        // given
+        Computer fakeComputer = new Computer(fixedNumberGenerator);
+        CountDownLatch latch = new CountDownLatch(1);
+        Thread testThread = new Thread(() -> {
+            try {
+                fakeComputer.generateRandomDigits();
+            } finally {
+                latch.countDown();
+            }
+        });
+
+        // when
+        testThread.start();
+
+        // then
+        boolean result = latch.await(1, TimeUnit.SECONDS);
+        assertThat(result).isFalse();
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/baseball/domain/RefereeTest.java b/src/test/java/baseball/domain/RefereeTest.java
new file mode 100644
index 0000000..7085c19
--- /dev/null
+++ b/src/test/java/baseball/domain/RefereeTest.java
@@ -0,0 +1,119 @@
+package baseball.domain;
+
+import baseball.common.exception.InvalidGameStatusException;
+import baseball.presentation.GameStatus;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+
+import static java.util.UUID.randomUUID;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+class RefereeTest {
+
+    @Test
+    void 컴퓨터와_유저의_숫자가_모두_같을때_참이다() throws IllegalAccessException {
+        // given
+        List<Integer> computerDigits = List.of(1, 2, 3);
+        List<Integer> userDigits = List.of(1, 2, 3);
+
+        String gameId = randomUUID().toString();
+        int tryCount = 1;
+        ComputerDigit computerDigit = new ComputerDigit(gameId, computerDigits);
+        UserDigit userDigit = new UserDigit(gameId, tryCount, userDigits);
+
+        Referee referee = new Referee();
+
+        // when
+        boolean result = referee.judge(computerDigit, userDigit);
+
+        // then
+        assertThat(result).isTrue();
+    }
+
+    @Test
+    void 컴퓨터와_유저의_숫자가_하나라도_다르면_거짓이다() throws IllegalAccessException {
+        // given
+        List<Integer> computerDigits = List.of(1, 2, 3);
+        List<Integer> userDigits = List.of(1, 2, 4);
+
+        String gameId = randomUUID().toString();
+        int tryCount = 1;
+        ComputerDigit computerDigit = new ComputerDigit(gameId, computerDigits);
+        UserDigit userDigit = new UserDigit(gameId, tryCount, userDigits);
+
+        Referee referee = new Referee();
+
+        // when
+        boolean result = referee.judge(computerDigit, userDigit);
+
+        // then
+        assertThat(result).isFalse();
+    }
+
+    @Test
+    void 게임아이디가_다르면_에러를_반환한다() throws IllegalAccessException {
+        // given
+        List<Integer> computerDigits = List.of(1, 2, 3);
+        List<Integer> userDigits = List.of(1, 2, 3);
+
+        String gameId1 = randomUUID().toString();
+        String gameId2 = randomUUID().toString();
+
+        int tryCount = 1;
+        ComputerDigit computerDigit = new ComputerDigit(gameId1, computerDigits);
+        UserDigit userDigit = new UserDigit(gameId2, tryCount, userDigits);
+
+        Referee referee = new Referee();
+
+        // when && then
+        assertThatThrownBy(() -> referee.judge(computerDigit, userDigit))
+                .isInstanceOf(IllegalAccessException.class)
+                .hasMessage("gameId가 일치하지 않습니다.");    }
+
+
+    @Test
+    void 심판콜을_생성한다() throws IllegalAccessException {
+        // given
+        List<Integer> computerDigits = List.of(1, 2, 3);
+        List<Integer> userDigits = List.of(3, 2, 1);
+        String message = "2볼 1스트라이크";
+
+        String gameId = randomUUID().toString();
+        int tryCount = 1;
+        ComputerDigit computerDigit = new ComputerDigit(gameId, computerDigits);
+        UserDigit userDigit = new UserDigit(gameId, tryCount, userDigits);
+
+        Referee referee = new Referee();
+
+        // when
+        referee.judge(computerDigit, userDigit);
+        String callMessage = referee.getCallMessage();
+
+        // then
+        assertThat(callMessage).isEqualTo(message);
+    }
+
+    @Test
+    void 낫싱_심판콜을_생성한다() throws IllegalAccessException {
+        // given
+        List<Integer> computerDigits = List.of(1, 2, 3);
+        List<Integer> userDigits = List.of(4, 5, 6);
+        String message = "낫싱";
+
+        String gameId = randomUUID().toString();
+        int tryCount = 1;
+        ComputerDigit computerDigit = new ComputerDigit(gameId, computerDigits);
+        UserDigit userDigit = new UserDigit(gameId, tryCount, userDigits);
+
+        Referee referee = new Referee();
+
+        // when
+        referee.judge(computerDigit, userDigit);
+        String callMessage = referee.getCallMessage();
+
+        // then
+        assertThat(callMessage).isEqualTo(message);
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/baseball/presentation/GameManagerTest.java b/src/test/java/baseball/presentation/GameManagerTest.java
new file mode 100644
index 0000000..12dbe26
--- /dev/null
+++ b/src/test/java/baseball/presentation/GameManagerTest.java
@@ -0,0 +1,56 @@
+package baseball.presentation;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+import baseball.presentation.input.InputProvider;
+import org.junit.jupiter.api.Test;
+import java.util.List;
+
+
+class GameManagerTest {
+
+    @Test
+    void 게임시작_입력값이_1이면_START를_반환한다() {
+        // given
+        MessagePrinter messagePrinter = new MessagePrinter();
+        InputProvider inputProvider = () -> "1";
+        GameManager gameManager = new GameManager(messagePrinter, inputProvider);
+
+        // when
+        GameStatus actual = gameManager.init();
+
+        // then
+        assertThat(actual).isEqualTo(GameStatus.START);
+    }
+
+    @Test
+    void 게임시작_입력값이_9이면_QUIT를_반환한다() {
+        // given
+        MessagePrinter messagePrinter = new MessagePrinter();
+        InputProvider inputProvider = () -> "9";
+        GameManager gameManager = new GameManager(messagePrinter, inputProvider);
+
+        // when
+        GameStatus actual = gameManager.init();
+
+        // then
+        assertThat(actual).isEqualTo(GameStatus.QUIT);
+    }
+
+    @Test
+    void 숫자입력_입력값이_올바르면_길이가_3이고_중복없는_리스트를_반환한다() {
+        // given
+        MessagePrinter messagePrinter = new MessagePrinter();
+        InputProvider inputProvider = () -> "123";
+        GameManager gameManager = new GameManager(messagePrinter, inputProvider);
+        List<Integer> expected = List.of(1, 2, 3);
+
+        // when
+        List<Integer> actual = gameManager.getUserDigits();
+
+        // then
+        assertThat(actual).isEqualTo(expected);
+        assertThat(actual.size()).isEqualTo(expected.size());
+        assertThat(actual).doesNotHaveDuplicates();
+    }
+}
\ No newline at end of file
diff --git a/src/test/java/baseball/presentation/GameStatusTest.java b/src/test/java/baseball/presentation/GameStatusTest.java
new file mode 100644
index 0000000..61d5d36
--- /dev/null
+++ b/src/test/java/baseball/presentation/GameStatusTest.java
@@ -0,0 +1,29 @@
+package baseball.presentation;
+
+import baseball.common.exception.InvalidGameStatusException;
+import org.junit.jupiter.params.ParameterizedTest;
+import org.junit.jupiter.params.provider.CsvSource;
+import org.junit.jupiter.params.provider.ValueSource;
+
+import static org.assertj.core.api.Assertions.*;
+
+class GameStatusTest {
+
+    @ParameterizedTest
+    @CsvSource({
+            "START, 1",
+            "QUIT, 9"
+    })
+    void 유효한_번호를_입력하면_해당하는_게임상태를_반환한다(GameStatus gameStatus, String description) throws InvalidGameStatusException {
+        assertThat(GameStatus.find(description)).isEqualByComparingTo(gameStatus);
+    }
+
+    @ParameterizedTest
+    @ValueSource(strings = {"2", "3", "가", "a", ""})
+    void 유효하지_않은_번호를_입력하면_에러를_반환한다(String description) {
+        assertThatThrownBy(() -> GameStatus.find(description))
+                .isInstanceOf(InvalidGameStatusException.class)
+                .hasMessage("1(시작) 또는 9(종료)를 눌러주세요.");
+    }
+
+}
\ No newline at end of file