diff --git a/apps/api/src/api/v1/webhooks.py b/apps/api/src/api/v1/webhooks.py
index 87f70ad3..3ebda8e6 100644
--- a/apps/api/src/api/v1/webhooks.py
+++ b/apps/api/src/api/v1/webhooks.py
@@ -93,6 +93,7 @@ async def create_incident_for_approval(
     alert_type: str,
     message: str,
     source: str = "alertmanager",
+    alertname: str | None = None,
 ) -> str:
     """
     為 Approval 創建對應的 Incident (活躍事件同步)
@@ -119,7 +120,7 @@ async def create_incident_for_approval(
         severity=severity,
         source=source,
         fired_at=now_taipei(),
-        labels={"namespace": namespace, "resource": target_resource},
+        labels={"namespace": namespace, "resource": target_resource, "alertname": alertname or alert_type},
         annotations={"message": message},
     )
 
@@ -1340,6 +1341,7 @@ async def alertmanager_webhook(
                 alert_type=alert_type,
                 message=message,
                 source="alertmanager",
+                alertname=alertname,
             )
 
             # 2026-04-06 ogt: Phase 26 — 回寫 incident_id 到 Approval
@@ -1462,6 +1464,7 @@ async def alertmanager_webhook(
                 alert_type=alert_type,
                 message=message,
                 source="alertmanager",
+                alertname=alertname,
             )
 
             background_tasks.add_task(