diff --git a/src/main/java/com/chint/application/dtos/SystemAnnouncementDTO.java b/src/main/java/com/chint/application/dtos/SystemAnnouncementDTO.java
index 15c7b065..18bd548d 100644
--- a/src/main/java/com/chint/application/dtos/SystemAnnouncementDTO.java
+++ b/src/main/java/com/chint/application/dtos/SystemAnnouncementDTO.java
@@ -6,10 +6,11 @@ import java.time.LocalDateTime;
 
 @Data
 public class SystemAnnouncementDTO {
+    private Long announcementId; // 公告的唯一标识符
     private String title; // 公告的标题
     private String content; // 公告的详细内容
     private String postedBy; // 发布公告的用户或管理员的用户名
-    private LocalDateTime postDate; // 公告发布的日期和时间
-    private LocalDateTime expiryDate; // 公告的过期日期
+    private String postDate; // 公告发布的日期和时间
+    private String expiryDate; // 公告的过期日期
     private Integer priority; // 公告的优先级，用于排序
 }
diff --git a/src/main/java/com/chint/application/system/SystemController.java b/src/main/java/com/chint/application/system/SystemController.java
index 7da758d4..09d79ec8 100644
--- a/src/main/java/com/chint/application/system/SystemController.java
+++ b/src/main/java/com/chint/application/system/SystemController.java
@@ -13,6 +13,8 @@ import org.springframework.web.bind.annotation.RequestBody;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
+import java.time.LocalDateTime;
+import java.util.Comparator;
 import java.util.List;
 
 import static com.chint.infrastructure.constant.CommonMessageConstant.NOT_FOUND;
@@ -33,6 +35,20 @@ public class SystemController {
         return Result.Success(SUCCESS, systemAnnouncementRepository.save(systemAnnouncement));
     }
 
+    @ApiOperation("更新公告")
+    @PostMapping("/announcement/update")
+    public Result<String> updateAnnouncement(@RequestBody SystemAnnouncementDTO systemAnnouncementDTO) {
+        systemAnnouncementRepository.findById(systemAnnouncementDTO.getAnnouncementId())
+                .ifPresent(systemAnnouncement -> {
+                    systemAnnouncement.setTitle(systemAnnouncementDTO.getTitle());
+                    systemAnnouncement.setContent(systemAnnouncementDTO.getContent());
+                    systemAnnouncement.setPriority(systemAnnouncementDTO.getPriority());
+                    systemAnnouncement.updateTime(systemAnnouncementDTO);
+                    systemAnnouncementRepository.save(systemAnnouncement);
+                });
+        return Result.Success(SUCCESS);
+    }
+
     @ApiOperation("查询最新公告")
     @PostMapping("/announcement/query/last")
     public Result<SystemAnnouncement> queryLastAnnouncement() {
@@ -42,13 +58,19 @@ public class SystemController {
     @ApiOperation("查询有效公告")
     @PostMapping("/announcement/query/effective")
     public Result<List<SystemAnnouncement>> queryEffectiveAnnouncement() {
-//        List<SystemAnnouncement> effective = systemAnnouncementRepository.findEffective();
-//
-//        effective.forEach(it->{
-//
-//        });
-//
-//        return Result.Success(SUCCESS, systemAnnouncementRepository.findNew().orElseThrow(() -> new NotFoundException(NOT_FOUND)));
-        return null;
+        List<SystemAnnouncement> effective = systemAnnouncementRepository.findEffective();
+        effective.forEach(it->{
+            LocalDateTime expiryDate = it.getExpiryDate();
+            if(expiryDate.isBefore(LocalDateTime.now())) {
+                it.setStatus("0");
+                systemAnnouncementRepository.save(it);
+            }
+        });
+        List<SystemAnnouncement> systemAnnouncements = effective
+                .stream()
+                .filter(it -> it.getStatus().equals("1"))
+                .sorted(Comparator.comparingInt(SystemAnnouncement::getPriority))
+                .toList();
+        return Result.Success(SUCCESS, systemAnnouncements);
     }
 }
diff --git a/src/main/java/com/chint/domain/aggregates/system/SystemAnnouncement.java b/src/main/java/com/chint/domain/aggregates/system/SystemAnnouncement.java
index c88006a7..eabb9238 100644
--- a/src/main/java/com/chint/domain/aggregates/system/SystemAnnouncement.java
+++ b/src/main/java/com/chint/domain/aggregates/system/SystemAnnouncement.java
@@ -4,13 +4,16 @@ import cn.hutool.core.bean.BeanUtil;
 import com.chint.application.dtos.SystemAnnouncementDTO;
 import com.chint.domain.aggregates.user.User;
 import com.chint.infrastructure.util.BaseContext;
+import com.chint.infrastructure.util.DateTimeUtil;
 import lombok.Data;
 import org.springframework.data.annotation.Id;
 import org.springframework.data.relational.core.mapping.Table;
 
 import java.io.Serial;
 import java.io.Serializable;
+import java.time.LocalDate;
 import java.time.LocalDateTime;
+import java.time.LocalTime;
 
 @Data
 @Table("system_announcements")
@@ -25,15 +28,23 @@ public class SystemAnnouncement implements Serializable {
     private LocalDateTime postDate; // 公告发布的日期和时间
     private LocalDateTime expiryDate; // 公告的过期日期
     private String status; // 公告的状态
-    private Integer priority; // 公告的优先级，用于排序、
+    private Integer priority; // 公告的优先级，用于排序
 
     public static SystemAnnouncement of(SystemAnnouncementDTO dto) {
         SystemAnnouncement systemAnnouncement = BeanUtil.copyProperties(dto, SystemAnnouncement.class);
         if (systemAnnouncement.getPostDate() == null) {
             systemAnnouncement.setPostDate(LocalDateTime.now());
+        } else {
+            LocalDateTime postDate = LocalDateTime.of(LocalDate.parse(dto.getPostDate(), DateTimeUtil.formatterDate),
+                    LocalTime.MIN);
+            systemAnnouncement.setPostDate(postDate);
         }
         if (systemAnnouncement.getExpiryDate() == null) {
             systemAnnouncement.setExpiryDate(LocalDateTime.now().plusDays(15L));
+        } else {
+            LocalDateTime expiryTime = LocalDateTime.of(LocalDate.parse(dto.getExpiryDate(), DateTimeUtil.formatterDate),
+                    LocalTime.MAX);
+            systemAnnouncement.setPostDate(expiryTime);
         }
         systemAnnouncement.setStatus("1");
         systemAnnouncement.setPriority(0);
@@ -46,4 +57,22 @@ public class SystemAnnouncement implements Serializable {
         }
         return systemAnnouncement;
     }
+
+    public SystemAnnouncement updateTime(SystemAnnouncementDTO dto) {
+        if (dto.getPostDate() != null) {
+            this.setPostDate(LocalDateTime.of(LocalDate.parse(dto.getPostDate(), DateTimeUtil.formatterDate),
+                    LocalTime.MIN));
+        }
+        if (dto.getExpiryDate() != null) {
+            this.setExpiryDate(LocalDateTime.of(LocalDate.parse(dto.getExpiryDate(), DateTimeUtil.formatterDate),
+                    LocalTime.MAX));
+        }
+        LocalDateTime expiryDate = this.getExpiryDate();
+        if (expiryDate.isBefore(LocalDateTime.now())) {
+            this.setStatus("0");
+        }
+
+        return this;
+    }
+
 }
diff --git a/src/main/java/com/chint/domain/repository/SystemAnnouncementRepository.java b/src/main/java/com/chint/domain/repository/SystemAnnouncementRepository.java
index 458664d2..85b10ebe 100644
--- a/src/main/java/com/chint/domain/repository/SystemAnnouncementRepository.java
+++ b/src/main/java/com/chint/domain/repository/SystemAnnouncementRepository.java
@@ -8,6 +8,8 @@ import java.util.Optional;
 public interface SystemAnnouncementRepository {
     SystemAnnouncement save(SystemAnnouncement systemAnnouncement);
 
+    Optional<SystemAnnouncement> findById(Long id);
+
     Optional<SystemAnnouncement> findNew();
 
     List<SystemAnnouncement> findAll();
diff --git a/src/main/java/com/chint/infrastructure/repository/SystemAnnouncementRepositoryImpl.java b/src/main/java/com/chint/infrastructure/repository/SystemAnnouncementRepositoryImpl.java
index ce0d5ca8..2fc58010 100644
--- a/src/main/java/com/chint/infrastructure/repository/SystemAnnouncementRepositoryImpl.java
+++ b/src/main/java/com/chint/infrastructure/repository/SystemAnnouncementRepositoryImpl.java
@@ -22,6 +22,11 @@ public class SystemAnnouncementRepositoryImpl implements SystemAnnouncementRepos
         return jdbcSystemAnnouncementRepository.save(systemAnnouncement);
     }
 
+    @Override
+    public Optional<SystemAnnouncement> findById(Long id) {
+        return jdbcSystemAnnouncementRepository.findById(id);
+    }
+
     @Override
     public Optional<SystemAnnouncement> findNew() {
         return jdbcSystemAnnouncementRepository.findTopByOrderByAnnouncementIdDesc();