diff --git a/static/admin/monitor.js b/static/admin/monitor.js
index 9a09846..699a6c9 100644
--- a/static/admin/monitor.js
+++ b/static/admin/monitor.js
@@ -364,6 +364,43 @@ async function loadMonitor(){
     updateSelCount();
     // 加载任务卡片
     loadJobsForMonitor();
+    // 加载异常汇总
+    loadSummary();
+  }catch(e){console.error(e);}
+}
+
+// ===== 异常设备汇总 =====
+async function loadSummary(){
+  try{
+    const r=await apiGet('/api/summary');
+    if(!r||!r.ok)return;
+    const counts=r.counts||{};
+    const errors=r.errors||[];
+    const errCount=(counts.error||0)+(counts.failed||0);
+    const badge=document.getElementById('summary-badge');
+    const panel=document.getElementById('summary-panel');
+    const empty=document.getElementById('summary-empty');
+    if(badge)badge.textContent='· 异常 '+errCount+' · 运行 '+counts.running+' · 完成 '+counts.done;
+    if(!panel||!empty)return;
+    if(!errors.length){
+      panel.style.display='none';
+      empty.style.display='block';
+      return;
+    }
+    panel.style.display='block';
+    empty.style.display='none';
+    const tb=document.getElementById('tb-summary');
+    tb.innerHTML=errors.map(e=>{
+      const st=e.status==='failed'?'<span class="label label-danger">失败</span>':'<span class="label label-warning">异常</span>';
+      const up=e.updated?new Date(e.updated*1000).toLocaleTimeString():'';
+      return '<tr>'+
+        '<td><strong>'+esc(e.serial)+'</strong>'+(e.model?' <span style="font-size:11px;color:#94a3b8">'+esc(e.model)+'</span>':'')+'</td>'+
+        '<td>'+st+'</td>'+
+        '<td>'+esc(e.task||'-')+'</td>'+
+        '<td>'+(e.attempt>0?e.attempt+'次':'<span class="text-muted">-</span>')+'</td>'+
+        '<td class="err-text" title="'+esc(e.last_error||'')+'">'+esc(e.last_error||'-')+'</td>'+
+      '</tr>';
+    }).join('');
   }catch(e){console.error(e);}
 }
 
diff --git a/templates/admin/monitor.html b/templates/admin/monitor.html
index 980f5df..64883d3 100644
--- a/templates/admin/monitor.html
+++ b/templates/admin/monitor.html
@@ -315,6 +315,16 @@ select.form-control{cursor:pointer}
   </table>
   <div class="list-pager" id="pager-devices"></div>
 
+  <!-- 异常设备汇总 -->
+  <div class="section-title" style="margin-top:8px">异常汇总 <span id="summary-badge" style="font-size:12px;font-weight:400;color:#94a3b8"></span></div>
+  <div id="summary-panel" style="display:none;margin-bottom:12px">
+    <table class="table">
+      <thead><tr><th>设备</th><th>状态</th><th>任务</th><th>重试</th><th>错误信息</th></tr></thead>
+      <tbody id="tb-summary"></tbody>
+    </table>
+  </div>
+  <div id="summary-empty" style="display:none" class="text-muted">无异常设备</div>
+
   <div class="section-title" style="margin-top:8px">任务运行概况</div>
   <div id="jobs-grid" class="jobs-grid"></div>
 </div>
diff --git a/web_server.py b/web_server.py
index 0390012..af85996 100644
--- a/web_server.py
+++ b/web_server.py
@@ -28,6 +28,7 @@ from flask_login import (LoginManager, login_user, logout_user,
 
 from core.stf_client import STFClient
 from core.task_manager import TaskManager
+from core.device_worker import get_all_worker_status
 from core.logger import get_logger, _LOG_DIR, _MODULE_FILES
 from core.models import db, init_db, User, DeviceGroup, TaskJob, CustomAction
 from core.apk_manager import ApkManager
@@ -147,6 +148,40 @@ def api_health():
         return jsonify({"ok": False, "status": "down", "error": str(e)}), 500
 
 
+# ================== API：失败任务汇总 ==================
+@app.route("/api/summary")
+@login_required
+def api_summary():
+    """失败/异常任务汇总：各状态计数 + 异常设备列表（last_error / 重试次数）。
+
+    供监控页"异常汇总"面板使用，便于长期运行观察设备健康度。
+    """
+    try:
+        sts = get_all_worker_status()
+        counts = {"total": 0, "running": 0, "done": 0,
+                  "error": 0, "failed": 0, "idle": 0}
+        errors = []
+        for s in sts:
+            st = s.get("status", "idle")
+            counts["total"] += 1
+            if st in counts:
+                counts[st] += 1
+            if st in ("error", "failed") and s.get("last_error"):
+                errors.append({
+                    "serial": s.get("serial"),
+                    "model": s.get("model", ""),
+                    "status": st,
+                    "last_error": s.get("last_error", ""),
+                    "task": s.get("task_job", ""),
+                    "attempt": s.get("attempt", 0),
+                    "updated": s.get("last_heartbeat", 0),
+                })
+        errors.sort(key=lambda x: x.get("updated", 0), reverse=True)
+        return jsonify({"ok": True, "counts": counts, "errors": errors[:50]})
+    except Exception as e:
+        return jsonify({"ok": False, "error": str(e)}), 500
+
+
 # ================== API：状态（监控大屏用）==================
 @app.route("/api/status")
 @login_required