diff --git a/xiangqi-engine.user.js b/xiangqi-engine.user.js
index 532d216..9d91b05 100644
--- a/xiangqi-engine.user.js
+++ b/xiangqi-engine.user.js
@@ -2,7 +2,7 @@
 // @name         Xiangqi.com 本地皮卡鱼引擎对接
 // @name:en      Xiangqi.com Local Pikafish Engine
 // @namespace    awesome-xiangqi
-// @version      1.4.1
+// @version      1.5.0
 // @description  在 play.xiangqi.com 对局中调用本地皮卡鱼引擎(http://127.0.0.1:9377)自动/手动走子
 // @description:en  Hook the site WebSocket and let a local Pikafish engine play for you
 // @match        https://play.xiangqi.com/*
@@ -16,7 +16,7 @@
   const ENGINE_URL = "http://127.0.0.1:9377";
   const NS = "42/xiangqi,";
   const FIRST_MOVE_EXTRA_SEC = 5;
-  const VERSION = "1.4.1";
+  const VERSION = "1.5.0";
   const PATCH_MARK = Symbol.for("xiangqi.pikafish.ws.patched");
   const uW = typeof unsafeWindow !== "undefined" ? unsafeWindow : window;
 
@@ -48,6 +48,7 @@
 
   const cfg = {
     enabled: storage.get("pf_enabled", "0") === "1",
+    useCloud: storage.get("pf_usecloud", "1") === "1",
     movetime: Math.max(50, +storage.get("pf_movetime", 800) || 800),
     depth: Math.max(0, +storage.get("pf_depth", 0) || 0),
     firstDelay: Math.max(0, +storage.get("pf_firstdelay", 0) || 0),
@@ -60,6 +61,7 @@
 
   function saveCfg() {
     storage.set("pf_enabled", cfg.enabled ? "1" : "0");
+    storage.set("pf_usecloud", cfg.useCloud ? "1" : "0");
     storage.set("pf_movetime", cfg.movetime);
     storage.set("pf_depth", cfg.depth);
     storage.set("pf_firstdelay", cfg.firstDelay);
@@ -195,7 +197,7 @@
 
   let liveWS = null;
 
-  async function engineBestmove({ moves, fen, movetime, depth, signal }) {
+  async function engineBestmove({ moves, fen, movetime, depth, useCloud, signal }) {
     const timeoutMs = Math.max(15000, movetime * 4 + 2000);
     const ctrl = new AbortController();
     const timer = setTimeout(
@@ -216,6 +218,7 @@
           fen: fen || undefined,
           movetime,
           depth: depth > 0 ? depth : undefined,
+          cloud: useCloud !== false,
         }),
         signal: ctrl.signal,
       });
@@ -296,6 +299,7 @@
         fen: G.fen,
         movetime: cfg.movetime,
         depth: cfg.depth,
+        useCloud: cfg.useCloud,
       });
       if (reqId !== G.reqId) return;
       if (G.over) throw new Error("对局已结束");
@@ -494,6 +498,7 @@
       <div class="title"><span>🐴 皮卡鱼</span><span class="dot" id="pf-dot" style="background:#666"></span></div>
       <div class="row"><label><input type="checkbox" id="pf-enabled"> 自动走子</label>
         <span id="pf-side-hint"></span></div>
+      <div class="row"><label><input type="checkbox" id="pf-cloud"> 使用云库</label></div>
       <div class="row"><span>每步用时(ms)</span><input type="number" id="pf-mt" min="50" step="50"></div>
       <div class="row"><span>深度(0=用时间)</span><input type="number" id="pf-depth" min="0" max="40" step="1"></div>
       <div class="row"><span>首步延迟(秒+5)</span><input type="number" id="pf-delay" min="0" max="120" step="1"></div>
@@ -519,6 +524,14 @@
       if (cfg.enabled) scheduleTurn(0);
     });
 
+    const cloudCb = panel.querySelector("#pf-cloud");
+    cloudCb.checked = cfg.useCloud;
+    cloudCb.addEventListener("change", () => {
+      cfg.useCloud = cloudCb.checked;
+      saveCfg();
+      if (cfg.enabled) scheduleTurn(0);
+    });
+
     const mt = panel.querySelector("#pf-mt");
     mt.value = cfg.movetime;
     mt.addEventListener("change", () => {
diff --git a/xiangqi_bot/server.py b/xiangqi_bot/server.py
index e05e811..68b485d 100644
--- a/xiangqi_bot/server.py
+++ b/xiangqi_bot/server.py
@@ -31,20 +31,22 @@ class Service:
             await self.engine.quit()
         await self.cloud.close()
 
-    async def bestmove(self, moves_site, fen=None, movetime=None, depth=None):
+    async def bestmove(self, moves_site, fen=None, movetime=None, depth=None, req_cloud=None):
         moves_ucci = [site_to_ucci(m) for m in moves_site]
         fen = fen or fen_from_moves(moves_ucci)
 
-        # 1. 云库优先
-        try:
-            cloud_hit = await self.cloud.best(fen, moves_count=len(moves_ucci))
-        except Exception as e:
-            log.warning('cloud error: %s', e)
-            cloud_hit = None
-        if cloud_hit and not depth:
-            mv, score, note = cloud_hit
-            return {'ok': True, 'source': 'cloud', 'move': ucci_to_site(mv),
-                    'score': f'cp {score}', 'note': note, 'ms': 0}
+        # 1. 云库优先(请求可显式关闭; 深度模式强制引擎)
+        use_cloud = req_cloud if req_cloud is not None else True
+        if use_cloud and not depth:
+            try:
+                cloud_hit = await self.cloud.best(fen, moves_count=len(moves_ucci))
+            except Exception as e:
+                log.warning('cloud error: %s', e)
+                cloud_hit = None
+            if cloud_hit:
+                mv, score, note = cloud_hit
+                return {'ok': True, 'source': 'cloud', 'move': ucci_to_site(mv),
+                        'score': f'cp {score}', 'note': note, 'ms': 0}
 
         # 2. 皮卡鱼兜底
         try:
@@ -96,6 +98,7 @@ def make_app(args):
                 fen=req.get('fen'),
                 movetime=req.get('movetime'),
                 depth=req.get('depth'),
+                req_cloud=req.get('cloud'),
             )
             return web.json_response(out)
         except Exception as e: