diff --git a/src/main/java/com/aisip/OnO/backend/Dto/User/UserResponseDto.java b/src/main/java/com/aisip/OnO/backend/Dto/User/UserResponseDto.java
index 2d95039..fe39176 100644
--- a/src/main/java/com/aisip/OnO/backend/Dto/User/UserResponseDto.java
+++ b/src/main/java/com/aisip/OnO/backend/Dto/User/UserResponseDto.java
@@ -22,6 +22,8 @@ public class UserResponseDto {
     @Enumerated(EnumType.STRING)
     private UserType userType;
 
+    private boolean firstLogin;
+
     private LocalDateTime createdAt;
 
     private LocalDateTime updatedAt;
diff --git a/src/main/java/com/aisip/OnO/backend/converter/UserConverter.java b/src/main/java/com/aisip/OnO/backend/converter/UserConverter.java
index 394e003..4243928 100644
--- a/src/main/java/com/aisip/OnO/backend/converter/UserConverter.java
+++ b/src/main/java/com/aisip/OnO/backend/converter/UserConverter.java
@@ -6,6 +6,10 @@
 public class UserConverter {
 
     public static UserResponseDto convertToResponseDto(User user) {
+        return convertToResponseDto(user, false);
+    }
+
+    public static UserResponseDto convertToResponseDto(User user, boolean firstLogin) {
 
         if (user == null) {
             return null;
@@ -17,6 +21,7 @@ public static UserResponseDto convertToResponseDto(User user) {
                 .userEmail(user.getEmail())
                 .userIdentifier(user.getIdentifier())
                 .userType(user.getType())
+                .firstLogin(firstLogin)
                 .updatedAt(user.getUpdatedAt())
                 .createdAt(user.getCreatedAt())
                 .build();
diff --git a/src/main/java/com/aisip/OnO/backend/service/UserServiceImpl.java b/src/main/java/com/aisip/OnO/backend/service/UserServiceImpl.java
index d2c0b16..5ba7004 100644
--- a/src/main/java/com/aisip/OnO/backend/service/UserServiceImpl.java
+++ b/src/main/java/com/aisip/OnO/backend/service/UserServiceImpl.java
@@ -10,6 +10,9 @@
 import lombok.RequiredArgsConstructor;
 import org.springframework.stereotype.Service;
 
+import java.time.Duration;
+import java.time.LocalDate;
+import java.time.LocalDateTime;
 import java.util.List;
 import java.util.Optional;
 import java.util.UUID;
@@ -32,7 +35,7 @@ public UserResponseDto registerOrLoginUser(String email, String name, String ide
             user.setIdentifier(identifier);
             user.setType(userType);
             User resultUser = userRepository.save(user);
-            return UserConverter.convertToResponseDto(resultUser);
+            return UserConverter.convertToResponseDto(resultUser, true);
         }
 
         return UserConverter.convertToResponseDto(optionalUser.get());
@@ -40,9 +43,25 @@ public UserResponseDto registerOrLoginUser(String email, String name, String ide
 
     public UserResponseDto getUserById(Long userId) {
 
-        User user = userRepository.findById(userId).orElse(null);
+        Optional<User> optionalUser = userRepository.findById(userId);
+
+        if(optionalUser.isPresent()){
+
+            User user = optionalUser.get();
+            LocalDateTime createdAtDateTime = user.getCreatedAt(); // LocalDateTime으로 변경
+            LocalDateTime now = LocalDateTime.now();
+
+            // 두 시간 간의 차이를 계산하여 1시간 이내인지 확인
+            Duration duration = Duration.between(createdAtDateTime, now);
 
-        return UserConverter.convertToResponseDto(user);
+            if (duration.toHours() < 1) {
+                return UserConverter.convertToResponseDto(user, true);
+            }
+
+            return UserConverter.convertToResponseDto(user);
+        }
+
+        return null;
     }
 
     @Override