diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/alarm/service/AlarmService.java b/src/main/java/DGU_AI_LAB/admin_be/domain/alarm/service/AlarmService.java
index 5fb03c03..37a42b9b 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/alarm/service/AlarmService.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/alarm/service/AlarmService.java
@@ -1,6 +1,7 @@
 package DGU_AI_LAB.admin_be.domain.alarm.service;
 
 import DGU_AI_LAB.admin_be.domain.requests.entity.Request;
+import DGU_AI_LAB.admin_be.domain.users.entity.User;
 import DGU_AI_LAB.admin_be.error.ErrorCode;
 import DGU_AI_LAB.admin_be.error.exception.BusinessException;
 import lombok.RequiredArgsConstructor;
@@ -213,6 +214,38 @@ public void sendNewRequestNotification(Request request) {
         sendSlackAlert(message, targetWebhookUrl);
     }
 
+    /**
+     * 사용자에게 서버 사용 신청 승인 알림을 보냅니다.
+     * @param request 승인된 Request 엔티티
+     */
+    public void sendApprovalNotification(Request request) {
+        User user = request.getUser();
+        String subject = "[DGU AI LAB] 서버 사용 신청이 승인되었습니다.";
+        String message = String.format(
+                """
+                🎉 %s님의 서버 사용 신청이 성공적으로 승인되었습니다! 🎉
+                
+                아래 정보를 사용하여 서버에 접속해 주세요.
+                -------------------------------------
+                - Ubuntu 사용자 이름: %s
+                - 할당된 서버: %s
+                - 컨테이너 이미지: %s:%s
+                - 할당된 볼륨 크기: %d GiB
+                - 만료일: %s
+                -------------------------------------
+                
+                궁금한 점이 있다면 관리자에게 문의해 주세요.
+                """,
+                user.getName(),
+                request.getUbuntuUsername(),
+                request.getResourceGroup().getServerName(),
+                request.getContainerImage().getImageName(),
+                request.getContainerImage().getImageVersion(),
+                request.getVolumeSizeGiB(),
+                request.getExpiresAt().toLocalDate().toString()
+        );
 
+        sendAllAlerts(user.getName(), user.getEmail(), subject, message);
+    }
 
 }
\ No newline at end of file
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/gpus/entity/Gpu.java b/src/main/java/DGU_AI_LAB/admin_be/domain/gpus/entity/Gpu.java
index 2d7a5d90..797f101d 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/gpus/entity/Gpu.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/gpus/entity/Gpu.java
@@ -8,7 +8,6 @@
 @Table(name = "gpus")
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-@EqualsAndHashCode(of = "gpuId")
 public class Gpu {
 
     @Id
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/groups/entity/Group.java b/src/main/java/DGU_AI_LAB/admin_be/domain/groups/entity/Group.java
index 00bb0a90..e3fc2a4e 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/groups/entity/Group.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/groups/entity/Group.java
@@ -8,7 +8,7 @@
 @Table(name = "`groups`")
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-@EqualsAndHashCode(of = "groupId")
+@EqualsAndHashCode(of = "ubuntuGid")
 public class Group {
 
     @Id
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/AdminRequestChangeController.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/AdminRequestChangeController.java
index a3aa40a5..2ab71d93 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/AdminRequestChangeController.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/AdminRequestChangeController.java
@@ -33,6 +33,16 @@ public ResponseEntity<SuccessResponse<?>> getChangeRequests() {
         return SuccessResponse.ok(changeRequests);
     }
 
+    /**
+     * 모든 변경 요청 목록 조회 (관리자용)
+     * 모든 상태의 ChangeRequest 목록을 반환합니다.
+     */
+    @GetMapping("/all")
+    public ResponseEntity<SuccessResponse<?>> getAllChangeRequests() {
+        List<ChangeRequestResponseDTO> changeRequests = adminRequestQueryService.getAllChangeRequests();
+        return SuccessResponse.ok(changeRequests);
+    }
+
     @PatchMapping("/approve")
     public ResponseEntity<SuccessResponse<?>> approveModification(
             @AuthenticationPrincipal(expression = "userId") Long adminId,
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/RequestController.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/RequestController.java
index c0242524..580381ed 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/RequestController.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/RequestController.java
@@ -3,6 +3,7 @@
 import DGU_AI_LAB.admin_be.domain.requests.controller.docs.RequestApi;
 import DGU_AI_LAB.admin_be.domain.requests.dto.request.SingleChangeRequestDTO;
 import DGU_AI_LAB.admin_be.domain.requests.dto.request.SaveRequestRequestDTO;
+import DGU_AI_LAB.admin_be.domain.requests.dto.response.ChangeRequestResponseDTO;
 import DGU_AI_LAB.admin_be.domain.requests.dto.response.SaveRequestResponseDTO;
 import DGU_AI_LAB.admin_be.domain.requests.service.RequestCommandService;
 import DGU_AI_LAB.admin_be.domain.requests.service.RequestQueryService;
@@ -74,4 +75,13 @@ public ResponseEntity<SuccessResponse<?>> getAllFulfilledUsernames() {
         List<String> usernames = requestQueryService.getAllFulfilledUsernames();
         return SuccessResponse.ok(usernames);
     }
+
+    /**
+     * 나의 변경 요청 목록 조회
+     */
+    @GetMapping("/my/changes")
+    public ResponseEntity<SuccessResponse<?>> getMyChangeRequests(@AuthenticationPrincipal CustomUserDetails user) {
+        List<ChangeRequestResponseDTO> changeRequests = requestQueryService.getMyChangeRequests(user.getUserId());
+        return SuccessResponse.ok(changeRequests);
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/AdminRequestChangeApi.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/AdminRequestChangeApi.java
index a9e7d8ed..47fe62ec 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/AdminRequestChangeApi.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/AdminRequestChangeApi.java
@@ -22,6 +22,13 @@ public interface AdminRequestChangeApi {
     })
     ResponseEntity<SuccessResponse<?>> getChangeRequests();
 
+    @Operation(summary = "모든 변경 요청 목록 조회", description = "모든 상태의 변경 요청 목록을 조회합니다.")
+    @ApiResponses({
+            @ApiResponse(responseCode = "200", description = "성공",
+                    content = @Content(schema = @Schema(implementation = SuccessResponse.class)))
+    })
+    ResponseEntity<SuccessResponse<?>> getAllChangeRequests();
+
     @Operation(summary = "변경 요청 승인", description = "PENDING 상태의 변경 요청을 승인하고 설정을 업데이트합니다.")
     @ApiResponses({
             @ApiResponse(responseCode = "200", description = "성공",
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/RequestApi.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/RequestApi.java
index 1a68b45e..0bad7452 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/RequestApi.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/controller/docs/RequestApi.java
@@ -1,6 +1,7 @@
 package DGU_AI_LAB.admin_be.domain.requests.controller.docs;
 
 import DGU_AI_LAB.admin_be.domain.requests.dto.request.SaveRequestRequestDTO;
+import DGU_AI_LAB.admin_be.domain.requests.dto.response.ChangeRequestResponseDTO;
 import DGU_AI_LAB.admin_be.domain.requests.dto.response.SaveRequestResponseDTO;
 import DGU_AI_LAB.admin_be.global.auth.CustomUserDetails;
 import DGU_AI_LAB.admin_be.global.common.SuccessResponse;
@@ -78,4 +79,18 @@ ResponseEntity<SuccessResponse<?>> getMyApprovedRequests(
             content = @Content(schema = @Schema(implementation = SuccessResponse.class))
     )
     ResponseEntity<SuccessResponse<?>> getAllFulfilledUsernames();
+
+    @Operation(
+            summary = "내 변경 요청 목록 조회",
+            description = "로그인된 사용자가 제출한 모든 변경 요청 내역을 조회합니다. 모든 상태(PENDING, FULFILLED, DENIED)의 변경 요청이 포함됩니다."
+    )
+    @ApiResponse(
+            responseCode = "200",
+            description = "조회 성공",
+            content = @Content(array = @ArraySchema(schema = @Schema(implementation = ChangeRequestResponseDTO.class)))
+    )
+    ResponseEntity<SuccessResponse<?>> getMyChangeRequests(
+            @Parameter(hidden = true, description = "인증된 사용자")
+            CustomUserDetails user
+    );
 }
\ No newline at end of file
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/dto/response/ChangeRequestResponseDTO.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/dto/response/ChangeRequestResponseDTO.java
index 93bc46ec..111c6fd2 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/dto/response/ChangeRequestResponseDTO.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/dto/response/ChangeRequestResponseDTO.java
@@ -18,6 +18,7 @@ public record ChangeRequestResponseDTO(
         @JsonRawValue String newValue,
         String reason,
         Status status,
+        String adminComment,
         AdminUserInfo requestedBy,
         LocalDateTime createdAt
 ) {
@@ -30,6 +31,7 @@ public static ChangeRequestResponseDTO fromEntity(ChangeRequest changeRequest) {
                 .newValue(changeRequest.getNewValue())
                 .reason(changeRequest.getReason())
                 .status(changeRequest.getStatus())
+                .adminComment(changeRequest.getAdminComment())
                 .requestedBy(AdminUserInfo.fromEntity(changeRequest.getRequestedBy()))
                 .createdAt(changeRequest.getCreatedAt())
                 .build();
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/Request.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/Request.java
index ba8a3838..6c360c93 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/Request.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/Request.java
@@ -19,6 +19,7 @@
 @Table(name = "requests")
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
+@EqualsAndHashCode(of = "ubuntuUsername", callSuper = false)
 public class Request extends BaseTimeEntity {
 
     @Id
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/RequestGroup.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/RequestGroup.java
index 945e967c..d1263245 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/RequestGroup.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/entity/RequestGroup.java
@@ -8,18 +8,14 @@
 
 @Entity
 @Table(name = "request_groups")
-@Access(AccessType.FIELD)
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
-@EqualsAndHashCode(of = "id")
+@EqualsAndHashCode(of = {"request", "group"})
 public class RequestGroup {
 
     @EmbeddedId
     private RequestGroupId id;
 
-    @Column(name = "created_at", nullable = false)
-    private LocalDateTime createdAt;
-
     @ManyToOne(fetch = FetchType.LAZY) @MapsId("requestId")
     @JoinColumn(name = "request_id", nullable = false)
     private Request request;
@@ -28,6 +24,9 @@ public class RequestGroup {
     @JoinColumn(name = "ubuntu_gid", nullable = false)
     private Group group;
 
+    @Column(name = "created_at", nullable = false)
+    private LocalDateTime createdAt;
+
     @Builder
     public RequestGroup(Request request, Group group) {
         this.request = request;
@@ -36,10 +35,12 @@ public RequestGroup(Request request, Group group) {
 
     @PrePersist
     void onCreate() {
-        if (createdAt == null) createdAt = LocalDateTime.now();
-        // @MapsId가 id를 자동으로 채워주지만 방어적으로 ID도 보완
-        if (id == null && request != null && group != null) {
-            id = new RequestGroupId(request.getRequestId(), group.getUbuntuGid());
+        if (this.createdAt == null) {
+            this.createdAt = LocalDateTime.now();
+        }
+
+        if (this.id == null) {
+            this.id = new RequestGroupId(this.request.getRequestId(), this.group.getUbuntuGid());
         }
     }
-}
+}
\ No newline at end of file
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/repository/ChangeRequestRepository.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/repository/ChangeRequestRepository.java
index f82ec134..d58762c3 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/repository/ChangeRequestRepository.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/repository/ChangeRequestRepository.java
@@ -9,4 +9,5 @@
 public interface ChangeRequestRepository extends JpaRepository<ChangeRequest, Long> {
     List<ChangeRequest> findAllByStatus(Status status);
     List<ChangeRequest> findAllByRequestedBy_UserIdAndStatus(Long userId, Status status);
+    List<ChangeRequest> findAllByRequestedBy_UserId(Long userId);
 }
\ No newline at end of file
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestCommandService.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestCommandService.java
index 175dcc56..a769d26e 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestCommandService.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestCommandService.java
@@ -1,5 +1,6 @@
 package DGU_AI_LAB.admin_be.domain.requests.service;
 
+import DGU_AI_LAB.admin_be.domain.alarm.service.AlarmService;
 import DGU_AI_LAB.admin_be.domain.containerImage.entity.ContainerImage;
 import DGU_AI_LAB.admin_be.domain.containerImage.repository.ContainerImageRepository;
 import DGU_AI_LAB.admin_be.domain.groups.entity.Group;
@@ -42,6 +43,8 @@
 @Transactional
 public class AdminRequestCommandService {
 
+    private final AlarmService alarmService;
+
     private final RequestRepository requestRepository;
     private final UserRepository userRepository;
     private final ContainerImageRepository containerImageRepository;
@@ -152,8 +155,16 @@ public SaveRequestResponseDTO approveRequest(ApproveRequestDTO dto) {
         ResourceGroup rg = resourceGroupRepository.findById(dto.resourceGroupId())
                 .orElseThrow(() -> new BusinessException(ErrorCode.RESOURCE_NOT_FOUND));
         request.approve(image, rg, dto.volumeSizeGiB(), dto.adminComment());
-        requestRepository.flush();
+        // requestRepository.flush();
 
+        // 4. 사용자에게 승인 알림 발송
+        try {
+            alarmService.sendApprovalNotification(request);
+            log.info("사용자 '{}'에게 승인 알림을 성공적으로 발송했습니다.", request.getUser().getName());
+        } catch (Exception e) {
+            log.warn("사용자 '{}'에게 승인 알림을 보내는 데 실패했습니다. (RequestId: {})",
+                    request.getUser().getName(), request.getRequestId(), e);
+        }
         return SaveRequestResponseDTO.fromEntity(request);
     }
 
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestQueryService.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestQueryService.java
index daf801c3..9a40f678 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestQueryService.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/AdminRequestQueryService.java
@@ -64,4 +64,10 @@ public List<ChangeRequestResponseDTO> getChangeRequests() {
                 .map(ChangeRequestResponseDTO::fromEntity)
                 .collect(Collectors.toList());
     }
+
+    public List<ChangeRequestResponseDTO> getAllChangeRequests() {
+        return changeRequestRepository.findAll().stream()
+                .map(ChangeRequestResponseDTO::fromEntity)
+                .collect(Collectors.toList());
+    }
 }
\ No newline at end of file
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/RequestQueryService.java b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/RequestQueryService.java
index 07eb31ed..14fb12d2 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/RequestQueryService.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/requests/service/RequestQueryService.java
@@ -1,12 +1,14 @@
 package DGU_AI_LAB.admin_be.domain.requests.service;
 
 import DGU_AI_LAB.admin_be.domain.portRequests.service.PortRequestService;
+import DGU_AI_LAB.admin_be.domain.requests.dto.response.ChangeRequestResponseDTO;
 import DGU_AI_LAB.admin_be.domain.requests.dto.response.ContainerInfoDTO;
 import DGU_AI_LAB.admin_be.domain.requests.dto.response.PortMappingDTO;
 import DGU_AI_LAB.admin_be.domain.requests.dto.response.ResourceUsageDTO;
 import DGU_AI_LAB.admin_be.domain.requests.dto.response.SaveRequestResponseDTO;
 import DGU_AI_LAB.admin_be.domain.requests.entity.Request;
 import DGU_AI_LAB.admin_be.domain.requests.entity.Status;
+import DGU_AI_LAB.admin_be.domain.requests.repository.ChangeRequestRepository;
 import DGU_AI_LAB.admin_be.domain.requests.repository.RequestRepository;
 import DGU_AI_LAB.admin_be.domain.users.repository.UserRepository;
 import DGU_AI_LAB.admin_be.error.ErrorCode;
@@ -25,6 +27,7 @@
 public class RequestQueryService {
 
     private final RequestRepository requestRepository;
+    private final ChangeRequestRepository changeRequestRepository;
     private final UserRepository userRepository;
     private final PortRequestService portRequestService;
 
@@ -79,4 +82,14 @@ public List<SaveRequestResponseDTO> getApprovedRequestsByUserId(Long userId) {
                 .toList();
     }
 
+    /** 내 변경 요청 목록 조회 */
+    public List<ChangeRequestResponseDTO> getMyChangeRequests(Long userId) {
+        if (!userRepository.existsById(userId)) {
+            throw new BusinessException(ErrorCode.USER_NOT_FOUND);
+        }
+        return changeRequestRepository.findAllByRequestedBy_UserId(userId).stream()
+                .map(ChangeRequestResponseDTO::fromEntity)
+                .toList();
+    }
+
 }
diff --git a/src/main/java/DGU_AI_LAB/admin_be/domain/users/entity/User.java b/src/main/java/DGU_AI_LAB/admin_be/domain/users/entity/User.java
index 4d468e24..594eaf62 100644
--- a/src/main/java/DGU_AI_LAB/admin_be/domain/users/entity/User.java
+++ b/src/main/java/DGU_AI_LAB/admin_be/domain/users/entity/User.java
@@ -8,6 +8,7 @@
 @Table(name = "users")
 @Getter
 @NoArgsConstructor(access = AccessLevel.PROTECTED)
+@EqualsAndHashCode(of = "email", callSuper = false)
 public class User extends BaseTimeEntity {
 
     @Id