diff --git a/das/src/main/java/com/das/modules/calc/functions/FunctionAvgValue.java b/das/src/main/java/com/das/modules/calc/functions/FunctionAvgValue.java
index 94b2359f..508c5f4a 100644
--- a/das/src/main/java/com/das/modules/calc/functions/FunctionAvgValue.java
+++ b/das/src/main/java/com/das/modules/calc/functions/FunctionAvgValue.java
@@ -63,7 +63,7 @@ public class FunctionAvgValue extends AbstractFunction {
         if (deviceInfoCache == null) {
             return AviatorNil.NIL;
         }
-        Double value = dataService.getTimeSumValue(deviceInfoCache.getDeviceId(), attrName, startTime.getTime(), endTime.getTime());
+        Double value = dataService.getTimeAvgValue(deviceInfoCache.getDeviceId(), attrName, startTime.getTime(), endTime.getTime());
         if (value == null){
             return AviatorNil.NIL;
         }