diff --git a/clody-app/src/main/java/com/clody/clodyapi/alarm/controller/AlarmControllerImpl.java b/clody-app/src/main/java/com/clody/clodyapi/alarm/controller/AlarmControllerImpl.java
index e333099..aa0bbc9 100644
--- a/clody-app/src/main/java/com/clody/clodyapi/alarm/controller/AlarmControllerImpl.java
+++ b/clody-app/src/main/java/com/clody/clodyapi/alarm/controller/AlarmControllerImpl.java
@@ -28,7 +28,7 @@ public class AlarmControllerImpl implements AlarmSwagger{
   public ResponseEntity<ApiResponse<AlarmResponse>> getUserAlarmInfo() {
     AlarmResponse response = retrieveAlarmInfoUsecase.retrieveAlarmInfo();
     return ResponseEntity.status(HttpStatus.OK).body(
-        ApiResponse.success(SuccessType.OK_SUCCESS, retrieveAlarmInfoUsecase.retrieveAlarmInfo())
+        ApiResponse.success(SuccessType.OK_SUCCESS, response)
     );
   }
 
diff --git a/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmFullResponse.java b/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmFullResponse.java
index 0ad53fd..21d7d67 100644
--- a/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmFullResponse.java
+++ b/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmFullResponse.java
@@ -2,22 +2,28 @@
 
 import com.clody.domain.alarm.dto.AlarmTotalInfo;
 import java.time.LocalTime;
+import java.time.format.DateTimeFormatter;
 
 public record AlarmFullResponse(
     boolean isDiaryAlarm,
     boolean isReplyAlarm,
-    LocalTime time,
+    String time,
     String fcmToken
 ) {
-    public static AlarmFullResponse of(boolean isDiaryAlarm, boolean isReplyAlarm, LocalTime time, String fcmToken) {
-        return new AlarmFullResponse(isDiaryAlarm, isReplyAlarm, time, fcmToken);
-    }
 
-    public static AlarmFullResponse parseFromAlarmInfo(AlarmTotalInfo alarmTotalInfo){
-        return AlarmFullResponse.of(alarmTotalInfo.isDiaryAlarm(), alarmTotalInfo.isReplyAlarm(), alarmTotalInfo.alarmTime(), alarmTotalInfo.fcmToken());
-    }
+  public static AlarmFullResponse of(boolean isDiaryAlarm, boolean isReplyAlarm, String time,
+      String fcmToken) {
+    return new AlarmFullResponse(isDiaryAlarm, isReplyAlarm, time, fcmToken);
+  }
 
-    public static AlarmTotalInfo toAlarmTotalInfo(AlarmFullResponse alarmFullResponse){
-        return AlarmTotalInfo.of(alarmFullResponse.fcmToken(), alarmFullResponse.time(), alarmFullResponse.isDiaryAlarm(), alarmFullResponse.isReplyAlarm());
-    }
+  public static AlarmFullResponse parseFromAlarmInfo(AlarmTotalInfo alarmTotalInfo) {
+      String timeWithoutSeconds = parseLocalTimeToString(alarmTotalInfo.alarmTime());
+    return AlarmFullResponse.of(alarmTotalInfo.isDiaryAlarm(), alarmTotalInfo.isReplyAlarm(),
+        timeWithoutSeconds, alarmTotalInfo.fcmToken());
+  }
+
+  private static String parseLocalTimeToString(LocalTime time) {
+    DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm");
+    return time.format(formatter);
+  }
 }
diff --git a/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmResponse.java b/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmResponse.java
index 77a18ef..8656e0c 100644
--- a/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmResponse.java
+++ b/clody-app/src/main/java/com/clody/clodyapi/alarm/dto/response/AlarmResponse.java
@@ -2,17 +2,24 @@
 
 import com.clody.domain.alarm.dto.AlarmTotalInfo;
 import java.time.LocalTime;
+import java.time.format.DateTimeFormatter;
 
 public record AlarmResponse(
     boolean isDiaryAlarm,
     boolean isReplyAlarm,
-    LocalTime time
+    String time
 ) {
-    public static AlarmResponse of(boolean isDiaryAlarm, boolean isReplyAlarm, LocalTime time) {
+    public static AlarmResponse of(boolean isDiaryAlarm, boolean isReplyAlarm, String time) {
         return new AlarmResponse(isDiaryAlarm, isReplyAlarm, time);
     }
 
     public static AlarmResponse of(AlarmTotalInfo alarmTotalInfo){
-        return new AlarmResponse(alarmTotalInfo.isDiaryAlarm(), alarmTotalInfo.isReplyAlarm(), alarmTotalInfo.alarmTime());
+        String timeWithoutSecond = parseLocalTimeToString(alarmTotalInfo.alarmTime());
+        return new AlarmResponse(alarmTotalInfo.isDiaryAlarm(), alarmTotalInfo.isReplyAlarm(), timeWithoutSecond);
+    }
+
+    private static String parseLocalTimeToString(LocalTime time) {
+        DateTimeFormatter formatter = DateTimeFormatter.ofPattern("HH:mm");
+        return time.format(formatter);
     }
 }
diff --git a/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/request/UserSignUpRequest.java b/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/request/UserSignUpRequest.java
index c380e2f..9df9d7d 100644
--- a/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/request/UserSignUpRequest.java
+++ b/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/request/UserSignUpRequest.java
@@ -7,7 +7,6 @@ public record UserSignUpRequest(
     String platform,
     String email,
     String name,
-
     String fcmToken
 ) {
 }
diff --git a/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/response/UserInfoGetResponse.java b/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/response/UserInfoGetResponse.java
index ea66d84..4a161c9 100644
--- a/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/response/UserInfoGetResponse.java
+++ b/clody-app/src/main/java/com/clody/clodyapi/user/controller/dto/response/UserInfoGetResponse.java
@@ -5,10 +5,10 @@
 public record UserInfoGetResponse(
         String email,
         String name,
-        Platform platform
+        String platform
 ) {
     public static UserInfoGetResponse of(String email, String name, Platform platform){
-        return new UserInfoGetResponse(email, name, platform);
+        return new UserInfoGetResponse(email, name, platform.getName());
     }
 }
 
diff --git a/clody-infra/src/main/java/com/clody/infra/models/diary/DiaryRepositoryAdapter.java b/clody-infra/src/main/java/com/clody/infra/models/diary/DiaryRepositoryAdapter.java
index 478ae54..e78a1fa 100644
--- a/clody-infra/src/main/java/com/clody/infra/models/diary/DiaryRepositoryAdapter.java
+++ b/clody-infra/src/main/java/com/clody/infra/models/diary/DiaryRepositoryAdapter.java
@@ -4,7 +4,7 @@
 import com.clody.domain.diary.repository.DiaryRepository;
 import com.clody.domain.user.User;
 import com.clody.support.dto.type.ErrorType;
-import com.clody.support.exception.NotFoundException;
+import com.clody.support.exception.BusinessException;
 import com.clody.support.security.util.JwtUtil;
 import java.time.LocalDateTime;
 import java.util.List;
@@ -29,7 +29,7 @@ public List<Diary> saveAll(List<Diary> diaries) {
   public List<Diary> findDiariesByUserIdAndCreatedAtBetween(Long userId, LocalDateTime start,
       LocalDateTime end) {
     return diaryRepository.findDiariesByUserIdAndCreatedAtBetween(userId, start, end)
-        .orElseThrow(() -> new NotFoundException(ErrorType.DIARY_MESSAGE_NOT_FOUND));
+        .orElseThrow(() -> new BusinessException(ErrorType.DIARY_MESSAGE_NOT_FOUND));
   }
 
   @Override