diff --git a/csst_ifs_sim/csst_ifs_sim.py b/csst_ifs_sim/csst_ifs_sim.py
index 2adbfedb0e069fd383e7f5f30c0d97ba5deeff1d..71a203ee262f7ec5c6760870384a86a741817dfb 100644
--- a/csst_ifs_sim/csst_ifs_sim.py
+++ b/csst_ifs_sim/csst_ifs_sim.py
@@ -1393,7 +1393,10 @@ class IFSsimulator():
         # else:
         #     self.result_path='/data/ifspip/CCD_ima/IFS_simData_'+self.source+ss+result_day
 
-        self.result_path = self.information['result_path']+'/'+result_day
+        dir_path = os.path.join(os.environ['UNIT_TEST_DATA_ROOT'],'ifs_sim/')
+        print(dir_path)
+        
+        self.result_path = dir_path+'/ifs_sim_result/'+result_day
 
         if os.path.isdir(self.result_path) == False:
             os.mkdir(self.result_path)