diff --git a/src/main/java/com/groom/orbit/schedule/app/ScheduleCommandService.java b/src/main/java/com/groom/orbit/schedule/app/ScheduleCommandService.java
index fa2e6a0..49c88e7 100644
--- a/src/main/java/com/groom/orbit/schedule/app/ScheduleCommandService.java
+++ b/src/main/java/com/groom/orbit/schedule/app/ScheduleCommandService.java
@@ -22,7 +22,6 @@ public class ScheduleCommandService {
   private final MemberQueryService memberQueryService;
 
   public CommonSuccessDto createSchedule(Long memberId, ScheduleRequestDto requestDto) {
-
     Member member = memberQueryService.findMember(memberId);
 
     Schedule schedule =
@@ -38,19 +37,24 @@ public CommonSuccessDto createSchedule(Long memberId, ScheduleRequestDto request
     return CommonSuccessDto.fromEntity(true);
   }
 
-  public CommonSuccessDto updateSchedule(Long scheduleId, ScheduleRequestDto requestDto) {
-
-    Schedule schedule = scheduleQueryService.findById(scheduleId);
+  public CommonSuccessDto updateSchedule(
+      Long memberId, Long scheduleId, ScheduleRequestDto requestDto) {
+    Schedule schedule = scheduleQueryService.findSchedule(scheduleId);
+    Member member = schedule.getMember();
+    member.validateId(memberId);
 
     schedule.updateSchedule(requestDto);
 
-    scheduleRepository.save(schedule);
-
     return CommonSuccessDto.fromEntity(true);
   }
 
-  public CommonSuccessDto deleteSchedule(Long scheduleId) {
+  public CommonSuccessDto deleteSchedule(Long memberId, Long scheduleId) {
+    Schedule schedule = scheduleQueryService.findSchedule(scheduleId);
+    Member member = schedule.getMember();
+    member.validateId(memberId);
+
     scheduleRepository.deleteById(scheduleId);
+
     return CommonSuccessDto.fromEntity(true);
   }
 }
diff --git a/src/main/java/com/groom/orbit/schedule/app/ScheduleQueryService.java b/src/main/java/com/groom/orbit/schedule/app/ScheduleQueryService.java
index 7a5e4f0..a3ef542 100644
--- a/src/main/java/com/groom/orbit/schedule/app/ScheduleQueryService.java
+++ b/src/main/java/com/groom/orbit/schedule/app/ScheduleQueryService.java
@@ -24,22 +24,21 @@ public class ScheduleQueryService {
   private final ScheduleRepository scheduleRepository;
   private final QuestRepository questRepository;
 
-  public Schedule findById(Long scheduleId) {
+  public Schedule findSchedule(Long scheduleId) {
     return scheduleRepository
         .findById(scheduleId)
         .orElseThrow(() -> new CommonException(ErrorCode.NOT_FOUND_SCHEDULE));
   }
 
   public GetCalendarResponseDto getCalendar(Long memberId, Integer month, Integer year) {
-
     List<GetScheduleResponseDto> scheduleResponseDtoList =
         scheduleRepository.findAllByMonthAndMemberId(memberId, month, year).stream()
-            .map(schedule -> GetScheduleResponseDto.fromSchedule(schedule))
+            .map(GetScheduleResponseDto::fromSchedule)
             .toList();
 
     List<GetQuestResponseDto> questResponseDtoList =
         questRepository.findAllByMonthAndMemberId(memberId, month, year).stream()
-            .map(quest -> GetQuestResponseDto.fromQuest(quest))
+            .map(GetQuestResponseDto::fromQuest)
             .toList();
 
     return GetCalendarResponseDto.fromCalendarList(questResponseDtoList, scheduleResponseDtoList);
diff --git a/src/main/java/com/groom/orbit/schedule/controller/ScheduleCommandController.java b/src/main/java/com/groom/orbit/schedule/controller/ScheduleCommandController.java
index 0b4c9da..e3dcf60 100644
--- a/src/main/java/com/groom/orbit/schedule/controller/ScheduleCommandController.java
+++ b/src/main/java/com/groom/orbit/schedule/controller/ScheduleCommandController.java
@@ -28,12 +28,13 @@ public ResponseDto<CommonSuccessDto> updateSchedule(
       @AuthMember Long memberId,
       @PathVariable Long scheduleId,
       @RequestBody ScheduleRequestDto scheduleRequestDto) {
-    return ResponseDto.ok(scheduleCommandService.updateSchedule(scheduleId, scheduleRequestDto));
+    return ResponseDto.ok(
+        scheduleCommandService.updateSchedule(memberId, scheduleId, scheduleRequestDto));
   }
 
   @DeleteMapping("/{scheduleId}")
   public ResponseDto<CommonSuccessDto> deleteSchedule(
       @AuthMember Long memberId, @PathVariable Long scheduleId) {
-    return ResponseDto.ok(scheduleCommandService.deleteSchedule(scheduleId));
+    return ResponseDto.ok(scheduleCommandService.deleteSchedule(memberId, scheduleId));
   }
 }