diff --git a/detection/src/main/java/com/njcn/gather/result/service/impl/ResultServiceImpl.java b/detection/src/main/java/com/njcn/gather/result/service/impl/ResultServiceImpl.java
index 1b654fb6..bb023818 100644
--- a/detection/src/main/java/com/njcn/gather/result/service/impl/ResultServiceImpl.java
+++ b/detection/src/main/java/com/njcn/gather/result/service/impl/ResultServiceImpl.java
@@ -781,13 +781,15 @@ public class ResultServiceImpl implements IResultService {
     }
 
     private Integer conform(Set<Integer> numbers) {
-        if (numbers.size() > 1) {
-            if (numbers.contains(4)) {
-                return 4;
-            } else if (numbers.contains(2)) {
-                return 2;
+        if (CollUtil.isNotEmpty(numbers)) {
+            if (numbers.size() > 1) {
+                if (numbers.contains(2)) {
+                    return 2;
+                }
             }
+            return numbers.iterator().next();
+        } else {
+            return 4;
         }
-        return numbers.iterator().next();
     }
 }