diff --git a/src/main/java/com/genersoft/iot/vmp/aiot/service/impl/AiScreenshotServiceImpl.java b/src/main/java/com/genersoft/iot/vmp/aiot/service/impl/AiScreenshotServiceImpl.java
index 8de97a5a7..d447085dc 100644
--- a/src/main/java/com/genersoft/iot/vmp/aiot/service/impl/AiScreenshotServiceImpl.java
+++ b/src/main/java/com/genersoft/iot/vmp/aiot/service/impl/AiScreenshotServiceImpl.java
@@ -320,8 +320,17 @@ public class AiScreenshotServiceImpl implements IAiScreenshotService {
         // 1. 查 DB 持久化的 cos_key（永不过期）- 优先直接操作 COS
         String cosKey = snapshotMapper.getCosKey(cameraCode);
         if (cosKey == null) {
-            log.warn("[AI截图] 代理图片: 无持久化记录 cameraCode={}", cameraCode);
-            return null;
+            // DB 无记录，自动触发一次截图并等待持久化
+            log.info("[AI截图] 代理图片: 无持久化记录，自动触发截图 cameraCode={}", cameraCode);
+            Map<String, Object> snapResult = requestScreenshot(cameraCode, true);
+            if ("ok".equals(snapResult.get("status"))) {
+                // 截图成功，重新查 DB
+                cosKey = snapshotMapper.getCosKey(cameraCode);
+            }
+            if (cosKey == null) {
+                log.warn("[AI截图] 代理图片: 自动截图后仍无持久化记录 cameraCode={}", cameraCode);
+                return null;
+            }
         }
 
         // 2. 通过 CosUtil 直接生成 presigned URL