diff --git a/ruoyi-admin/src/main/java/com/ruoyi/websocket/service/RoomRoomStateService.java b/ruoyi-admin/src/main/java/com/ruoyi/websocket/service/RoomRoomStateService.java
new file mode 100644
index 0000000..9498dfe
--- /dev/null
+++ b/ruoyi-admin/src/main/java/com/ruoyi/websocket/service/RoomRoomStateService.java
@@ -0,0 +1,61 @@
+package com.ruoyi.websocket.service;
+
+import java.util.HashSet;
+import java.util.Set;
+import java.util.concurrent.TimeUnit;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.beans.factory.annotation.Qualifier;
+import org.springframework.data.redis.core.RedisTemplate;
+import org.springframework.stereotype.Service;
+
+/**
+ * 房间状态服务：持久化房间内可见航线等状态，供新加入用户同步
+ */
+@Service
+public class RoomRoomStateService {
+
+    private static final String ROOM_VISIBLE_ROUTES_PREFIX = "room:";
+    private static final String ROOM_VISIBLE_ROUTES_SUFFIX = ":visibleRoutes";
+    private static final int EXPIRE_HOURS = 24;
+
+    @Autowired
+    @Qualifier("stringObjectRedisTemplate")
+    private RedisTemplate<String, Object> redisTemplate;
+
+    private String visibleRoutesKey(Long roomId) {
+        return ROOM_VISIBLE_ROUTES_PREFIX + roomId + ROOM_VISIBLE_ROUTES_SUFFIX;
+    }
+
+    /** 更新航线可见状态 */
+    public void updateRouteVisibility(Long roomId, Long routeId, boolean visible) {
+        if (roomId == null || routeId == null) return;
+        String key = visibleRoutesKey(roomId);
+        if (visible) {
+            redisTemplate.opsForSet().add(key, routeId);
+        } else {
+            redisTemplate.opsForSet().remove(key, routeId);
+        }
+        redisTemplate.expire(key, EXPIRE_HOURS, TimeUnit.HOURS);
+    }
+
+    /** 获取房间内当前可见的航线 ID 集合 */
+    @SuppressWarnings("unchecked")
+    public Set<Long> getVisibleRouteIds(Long roomId) {
+        if (roomId == null) return new HashSet<>();
+        String key = visibleRoutesKey(roomId);
+        Set<Object> raw = redisTemplate.opsForSet().members(key);
+        Set<Long> result = new HashSet<>();
+        if (raw != null) {
+            for (Object o : raw) {
+                if (o instanceof Number) {
+                    result.add(((Number) o).longValue());
+                } else if (o != null) {
+                    try {
+                        result.add(Long.parseLong(o.toString()));
+                    } catch (NumberFormatException ignored) {}
+                }
+            }
+        }
+        return result;
+    }
+}