diff --git a/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java b/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java
index d9b031f..77bc13e 100644
--- a/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java
+++ b/physical-module-system/physical-system-biz/src/main/java/org/jeecg/modules/database/controller/ExperimentController.java
@@ -92,7 +92,7 @@ public class ExperimentController extends JeecgController<Experiment, IExperimen
                 for (ExperimentUser experimentUser : user) {
                     ExperimentUserDTO userDTO = ExperimentUserDTO.of(experimentUser);
                     SysUser sysUser = userService.getById(experimentUser.getUserId());
-                    if (Objects.nonNull(user)) {
+                    if (Objects.nonNull(sysUser)) {
                         userDTO.setUserName(sysUser.getRealname());
                     }
                     list.add(userDTO);