diff --git a/csst_ifs_sim/csst_ifs_sim.py b/csst_ifs_sim/csst_ifs_sim.py
index df714962174bf55807bdc3c95696fc440ee891b2..ec5467247596136b3b5a854ef94ef7d911669ea4 100644
--- a/csst_ifs_sim/csst_ifs_sim.py
+++ b/csst_ifs_sim/csst_ifs_sim.py
@@ -1976,18 +1976,20 @@ class IFSsimulator():
         else:
             ss = '_'
 
-        if self.information['dir_path'] == '/nfsdata/share/simulation-unittest/ifs_sim/':
-            self.result_path = self.information['dir_path'] + \
-                self.information['result_path']+'/'+self.source+ss+result_day
-        else:
+        # if self.information['dir_path'] == '/nfsdata/share/simulation-unittest/ifs_sim/':
+        #     self.result_path = self.information['dir_path'] + \
+        #         self.information['result_path']+'/'+self.source+ss+result_day
+        # else:
 
-            home_path = os.environ['HOME']
+        #     home_path = os.environ['HOME']
 
-            if home_path == '/home/yan':
+        #     if home_path == '/home/yan':
 
-                self.result_path = '../IFS_simData/'+self.source+ss+result_day
-            else:
-                self.result_path = '/data/ifspip/CCD_ima/'+self.source+ss+result_day
+        #         self.result_path = '../IFS_simData/'+self.source+ss+result_day
+        #     else:
+        #         self.result_path = '/data/ifspip/CCD_ima/'+self.source+ss+result_day
+                
+        self.result_path= self.information['result_path']+self.source+ss+result_day      
 
         if os.path.isdir(self.result_path) == False:
             os.mkdir(self.result_path)
@@ -5722,7 +5724,7 @@ class IFSsimulator():
 ############################################################################
 
 
-def runIFSsim(sourcein, configfile, dir_path, iLoop, debug, applyhole='no'):
+def runIFSsim(sourcein, configfile, dir_path, result_path,iLoop, debug, applyhole='no'):
     """
 
 
@@ -5756,9 +5758,25 @@ def runIFSsim(sourcein, configfile, dir_path, iLoop, debug, applyhole='no'):
     simulate[iLoop].information['dir_path'] = dir_path
 
     simulate[iLoop].information['debug'] = debug
+    
+    simulate[iLoop].information['result_path'] = result_path
+    
+    
 
     simulate[iLoop].simulate(sourcein, iLoop)
 
     return 1
 
 ############################## end  ##########################################
+     if self.information['dir_path'] == '/nfsdata/share/simulation-unittest/ifs_sim/':
+            self.result_path = self.information['dir_path'] + \
+                self.information['result_path']+'/'+self.source+ss+result_day
+        else:
+
+            home_path = os.environ['HOME']
+
+            if home_path == '/home/yan':
+
+                self.result_path = '../IFS_simData/'+self.source+ss+result_day
+            else:
+                self.result_path = '/data/ifspip/CCD_ima/'+self.source+ss+result_day
\ No newline at end of file
diff --git a/csst_ifs_sim/ifs_data/IFS_sim_C90.config b/csst_ifs_sim/ifs_data/IFS_sim_C90.config
index 943ff03183073528f20a476f6fa72b52f024be3e..36f626a510cce772461349d565bda11ddcf90870 100644
--- a/csst_ifs_sim/ifs_data/IFS_sim_C90.config
+++ b/csst_ifs_sim/ifs_data/IFS_sim_C90.config
@@ -8,7 +8,6 @@ CCDygap = 8.116
 
 sky_fitsin  =IFS_inputdata/FengshuaiData/NGC6397_S6102.fits
 
-result_path =ifs_sim_result
 
 debug =yes
 
diff --git a/tests/test_ifs_sim.py b/tests/test_ifs_sim.py
index fa7b8eeb98773d79f281ac5f84fce2de557999fc..d7bedfeba4f496f3e7808434d476fe333306cc6a 100644
--- a/tests/test_ifs_sim.py
+++ b/tests/test_ifs_sim.py
@@ -42,8 +42,12 @@ class TestDemoFunction(unittest.TestCase):
         sourcein = 'SCI'
         print(configfile)
         
-        debug=True        
-        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, 1, debug,'no')
+        debug=True 
+        
+        result_path=dir_path+'ifs_sim_result'
+        
+        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, result_path, 1, debug,'no')
+        
         self.assertEqual(
             1 , 1,
             "case 1: SCI sim passes.",
@@ -77,7 +81,9 @@ class TestDemoFunction(unittest.TestCase):
         print(configfile)
                 
         debug=True        
-        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, 1, debug,'no')
+        result_path=dir_path+'ifs_sim_result'
+        
+        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, result_path, 1, debug,'no')
         
         self.assertEqual(
             1 , 1,
@@ -112,7 +118,9 @@ class TestDemoFunction(unittest.TestCase):
         print(configfile)
                 
         debug=True        
-        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, 1, debug,'no')
+        result_path=dir_path+'ifs_sim_result'
+        
+        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, result_path, 1, debug,'no')
         
         self.assertEqual(
             1 , 1,
@@ -147,7 +155,9 @@ class TestDemoFunction(unittest.TestCase):
         print(configfile)
                 
         debug=True        
-        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, 1, debug,'no')
+        result_path=dir_path+'ifs_sim_result'
+        
+        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, result_path, 1, debug,'no')
         self.assertEqual(
             1 , 1,
             "case 4:  sim passes.",
@@ -181,7 +191,9 @@ class TestDemoFunction(unittest.TestCase):
         print(configfile)
                 
         debug=True        
-        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, 1, debug,'yes')
+        result_path=dir_path+'ifs_sim_result'
+        
+        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, result_path, 1, debug,'yes')
         self.assertEqual(
             1 , 1,
             "case 5:  sim passes.",
@@ -215,7 +227,9 @@ class TestDemoFunction(unittest.TestCase):
         print(configfile)
                 
         debug=True        
-        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, 1, debug,'no')
+        result_path=dir_path+'ifs_sim_result'
+        
+        csst_ifs_sim.runIFSsim(sourcein,  configfile, dir_path, result_path, 1, debug,'no')
         self.assertEqual(
             1 , 1,
             "case 6:  sim passes.",