diff --git a/src/main/java/ku_rum/backend/domain/alarm/application/AlarmService.java b/src/main/java/ku_rum/backend/domain/alarm/application/AlarmService.java
index 9652936b..d45924ef 100644
--- a/src/main/java/ku_rum/backend/domain/alarm/application/AlarmService.java
+++ b/src/main/java/ku_rum/backend/domain/alarm/application/AlarmService.java
@@ -167,6 +167,13 @@ public GetAlarmDisableResponse findDisableAlarm(CustomUserDetails userDetails) {
         return GetAlarmDisableResponse.from(userDisabledAlarms);
     }
 
+    @Transactional
+    public void patchAllUserAlarm(CustomUserDetails userDetails) {
+        User user = userService.getUser();
+        userAnnouncementRepository.markCheckedByUser(user);
+        alarmRepository.markCheckedByUser(user);
+    }
+
     private PatchAlarmResponse patchAlarm(Long userId, Long alarmId) {
         Alarm alarm = findAlarmById(alarmId);
 
diff --git a/src/main/java/ku_rum/backend/domain/alarm/domain/repository/AlarmRepository.java b/src/main/java/ku_rum/backend/domain/alarm/domain/repository/AlarmRepository.java
index 2c54c7e6..049a7eab 100644
--- a/src/main/java/ku_rum/backend/domain/alarm/domain/repository/AlarmRepository.java
+++ b/src/main/java/ku_rum/backend/domain/alarm/domain/repository/AlarmRepository.java
@@ -6,6 +6,7 @@
 import ku_rum.backend.domain.user.domain.User;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
@@ -24,4 +25,8 @@ public interface AlarmRepository extends JpaRepository<Alarm, Long> {
     Optional<Alarm> findById(Long AlarmId);
 
     long countByUserAndIsCheckedFalse(User user);
+
+    @Modifying
+    @Query("UPDATE Alarm alarm SET alarm.isChecked = true WHERE alarm.user = :user AND alarm.isChecked = false")
+    int markCheckedByUser(@Param("user") User user);
 }
diff --git a/src/main/java/ku_rum/backend/domain/alarm/domain/repository/UserAnnouncementRepository.java b/src/main/java/ku_rum/backend/domain/alarm/domain/repository/UserAnnouncementRepository.java
index 188a434b..8c27c553 100644
--- a/src/main/java/ku_rum/backend/domain/alarm/domain/repository/UserAnnouncementRepository.java
+++ b/src/main/java/ku_rum/backend/domain/alarm/domain/repository/UserAnnouncementRepository.java
@@ -5,6 +5,7 @@
 import ku_rum.backend.domain.user.domain.User;
 import org.springframework.data.domain.Pageable;
 import org.springframework.data.jpa.repository.JpaRepository;
+import org.springframework.data.jpa.repository.Modifying;
 import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.query.Param;
 import org.springframework.stereotype.Repository;
@@ -24,4 +25,8 @@ List<UserAnnouncement> findUserAnnouncement(@Param("user") User user, @Param("la
                                                 Pageable pageable);
 
     long countByUserAndIsCheckedFalse(User user);
+
+    @Modifying
+    @Query("UPDATE UserAnnouncement ua SET ua.isChecked = true WHERE ua.user = :user AND ua.isChecked = false")
+    int markCheckedByUser(@Param("user") User user);
 }
diff --git a/src/main/java/ku_rum/backend/domain/alarm/presentation/AlarmController.java b/src/main/java/ku_rum/backend/domain/alarm/presentation/AlarmController.java
index 46b5a26c..af4c8494 100644
--- a/src/main/java/ku_rum/backend/domain/alarm/presentation/AlarmController.java
+++ b/src/main/java/ku_rum/backend/domain/alarm/presentation/AlarmController.java
@@ -51,6 +51,12 @@ public BaseResponse<PatchAlarmResponse> patchAlarm(
         return BaseResponse.ok(response);
     }
 
+    @PatchMapping("/read-all")
+    public BaseResponse<Void> patchAllAlarm(@AuthenticationPrincipal final CustomUserDetails userDetails) {
+        alarmService.patchAllUserAlarm(userDetails);
+        return BaseResponse.ok();
+    }
+
     @PostMapping("/direct")
     public BaseResponse<Void> sendFcmMessage(@RequestBody DirectNotificationRequest request) {
         FcmDirectDto fcmDirectDto = new FcmDirectDto(request.title(), request.body(), request.userIds());
diff --git a/src/main/resources/config b/src/main/resources/config
index b9a38aae..963495c4 160000
--- a/src/main/resources/config
+++ b/src/main/resources/config
@@ -1 +1 @@
-Subproject commit b9a38aae3b125092669fc3d9216c47acd765d8ea
+Subproject commit 963495c41dce741c660957ec16da3727c9f41935
diff --git a/src/test/java/ku_rum/backend/domain/alarm/presentation/AlarmControllerTest.java b/src/test/java/ku_rum/backend/domain/alarm/presentation/AlarmControllerTest.java
index 565189fa..94c9f1f7 100644
--- a/src/test/java/ku_rum/backend/domain/alarm/presentation/AlarmControllerTest.java
+++ b/src/test/java/ku_rum/backend/domain/alarm/presentation/AlarmControllerTest.java
@@ -4,6 +4,7 @@
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.eq;
 import static org.mockito.BDDMockito.given;
+import static org.mockito.Mockito.doNothing;
 import static org.springframework.restdocs.headers.HeaderDocumentation.headerWithName;
 import static org.springframework.restdocs.mockmvc.RestDocumentationRequestBuilders.get;
 import static org.springframework.restdocs.mockmvc.RestDocumentationRequestBuilders.patch;
@@ -277,4 +278,33 @@ void getDisableAlarm() throws Exception {
                                 .build()
                 )));
     }
+
+    @DisplayName("알림을 전부 읽는다")
+    @Test
+    void patchAllAlarm() throws Exception {
+        // given
+
+        doNothing().when(alarmService).patchAllUserAlarm(any());
+
+        // when
+        mockMvc.perform(patch("/api/v1/alarm/read-all")
+                        .header("Authorization", "Bearer test-access-token"))
+                // then
+                .andDo(print())
+                .andExpect(status().isOk())
+                .andDo(restDocs.document(resource(
+                        ResourceSnippetParameters.builder()
+                                .tag("알림 조회 API")
+                                .description("알림을 전부 확인한다")
+                                .requestHeaders(
+                                        headerWithName("Authorization").description("발급 받은 액세스 토큰입니다.")
+                                )
+                                .responseFields(
+                                        fieldWithPath("code").description("응답 코드"),
+                                        fieldWithPath("status").description("응답 상태"),
+                                        fieldWithPath("message").description("응답 메시지")
+                                )
+                                .build()
+                )));
+    }
 }