diff --git a/novalon-manage-api/manage-sys/src/main/java/cn/novalon/manage/sys/core/service/impl/SysUserMessageService.java b/novalon-manage-api/manage-sys/src/main/java/cn/novalon/manage/sys/core/service/impl/SysUserMessageService.java
new file mode 100644
index 0000000..9906975
--- /dev/null
+++ b/novalon-manage-api/manage-sys/src/main/java/cn/novalon/manage/sys/core/service/impl/SysUserMessageService.java
@@ -0,0 +1,64 @@
+package cn.novalon.manage.sys.core.service.impl;
+
+import cn.novalon.manage.sys.core.domain.SysUserMessage;
+import cn.novalon.manage.sys.core.service.ISysUserMessageService;
+import cn.novalon.manage.sys.core.service.IWebSocketService;
+import cn.novalon.manage.sys.infrastructure.db.converter.SysUserMessageConverter;
+import cn.novalon.manage.sys.infrastructure.db.dao.SysUserMessageDao;
+import org.springframework.stereotype.Service;
+import reactor.core.publisher.Flux;
+import reactor.core.publisher.Mono;
+
+@Service
+public class SysUserMessageService implements ISysUserMessageService {
+
+    private final SysUserMessageDao dao;
+    private final SysUserMessageConverter converter;
+    private final IWebSocketService webSocketService;
+
+    public SysUserMessageService(SysUserMessageDao dao, SysUserMessageConverter converter,
+            IWebSocketService webSocketService) {
+        this.dao = dao;
+        this.converter = converter;
+        this.webSocketService = webSocketService;
+    }
+
+    @Override
+    public Flux<SysUserMessage> findByUserId(Long userId) {
+        return dao.findByUserIdOrderByCreateTimeDesc(userId)
+                .map(converter::toDomain);
+    }
+
+    @Override
+    public Flux<SysUserMessage> findByUserIdAndIsRead(Long userId, String isRead) {
+        return dao.findByUserIdAndIsReadOrderByCreateTimeDesc(userId, isRead)
+                .map(converter::toDomain);
+    }
+
+    @Override
+    public Mono<Long> countUnread(Long userId) {
+        return dao.countByUserIdAndIsRead(userId, "0");
+    }
+
+    @Override
+    public Mono<SysUserMessage> save(SysUserMessage message) {
+        return dao.save(converter.toEntity(message))
+                .map(converter::toDomain)
+                .flatMap(savedMessage -> {
+                    return webSocketService.notifyNewMessage(
+                            savedMessage.getUserId(),
+                            savedMessage.getTitle(),
+                            savedMessage.getContent()).thenReturn(savedMessage);
+                });
+    }
+
+    @Override
+    public Mono<Void> markAsRead(Long id) {
+        return dao.findById(id)
+                .flatMap(entity -> {
+                    entity.setIsRead("1");
+                    return dao.save(entity);
+                })
+                .then();
+    }
+}