diff --git a/ObservationSim/Config/Pointing.py b/ObservationSim/Config/Pointing.py
index a46ec68f0519bd7d36a603faec2f44f2eb570a61..698566ed9c73ad53c53f7428ad308861b482920d 100644
--- a/ObservationSim/Config/Pointing.py
+++ b/ObservationSim/Config/Pointing.py
@@ -6,7 +6,7 @@ from astropy.time import Time
 import ObservationSim.Instrument._util as _util
 
 class Pointing(object):
-    def __init__(self, id=0, ra=0., dec=0., img_pa=0., timestamp=1621915200, sat_x=0., sat_y=0., sat_z=0., sun_x=0., sun_y=0., sun_z=0., sat_vx=0., sat_vy=0., sat_vz=0., exp_time=150., pointing_type='SCI'):
+    def __init__(self, id=0, ra=0., dec=0., img_pa=0., timestamp=1621915200, sat_x=0., sat_y=0., sat_z=0., sun_x=0., sun_y=0., sun_z=0., sat_vx=0., sat_vy=0., sat_vz=0., exp_time=150., pointing_type='SCI', obs_config_file=None):
         self.id = id
         self.ra = ra
         self.dec = dec
@@ -19,6 +19,7 @@ class Pointing(object):
         self.pointing_type = pointing_type
         self.survey_field_type = 'WIDE'
         self.jdt = 0. 
+        self.obs_config_file = obs_config_file
     
     def get_full_depth_exptime(self, filter_type):
         if self.survey_field_type == 'WIDE':
@@ -70,9 +71,10 @@ class Pointing(object):
             if is_deep != -1.0:
                 self.survey_field_type = "DEEP"
             
+            if not self.obs_config_file:
+                self.obs_config_file = str(columns[20])
+            
             # Load the configuration file for this particular pointing
-            # [TODO]
-            self.obs_config_file = "/public/home/fangyuedong/project/csst-simulation/config/obs_config_SCI_WIDE_phot.yaml"
             with open(self.obs_config_file, "r") as stream:
                 try:
                     self.obs_param = yaml.safe_load(stream)
diff --git a/ObservationSim/_util.py b/ObservationSim/_util.py
index b6b5d61866f1ddd17a569a616f1d4420462c5522..164b9c564d73be279c9f5c65ca9643ec77ebd1f8 100755
--- a/ObservationSim/_util.py
+++ b/ObservationSim/_util.py
@@ -32,6 +32,10 @@ def generate_pointing_list(config, pointing_filename=None, data_dir=None):
     ipoint = 0
 
     run_pointings = config['obs_setting']['run_pointings']
+    if "obs_config_file" in config['obs_setting']:
+        obs_config_file = config['obs_setting']["obs_config_file"]
+    else:
+        obs_config_file = None
     
     if pointing_filename and data_dir:
         pointing_file = os.path.join(data_dir, pointing_filename)
@@ -48,7 +52,7 @@ def generate_pointing_list(config, pointing_filename=None, data_dir=None):
                 continue
             line = line.strip()
             columns = line.split()
-            pointing = Pointing()
+            pointing = Pointing(obs_config_file=obs_config_file)
             pointing.read_pointing_columns(columns=columns, id=ipoint)
             t += delta_t * 60.
             pointing_list.append(pointing)
@@ -67,7 +71,8 @@ def generate_pointing_list(config, pointing_filename=None, data_dir=None):
             img_pa=config["obs_setting"]["image_rot"],
             timestamp=t,
             exp_time=exp_time,
-            pointing_type='SCI'
+            pointing_type='SCI',
+            obs_config_file=obs_config_file
             )
         t += delta_t * 60.
         pointing_list.append(pointing)
diff --git a/config/config_overall.yaml b/config/config_overall.yaml
index 7bad886d754d4553246fecd61309fbe6b6e84dfb..01507ae21834a3a491e389137860b1c2d0651ece 100644
--- a/config/config_overall.yaml
+++ b/config/config_overall.yaml
@@ -28,7 +28,7 @@ run_option:
 
   # Output catalog only?
   # If yes, no imaging simulation will run
-  out_cat_only: NO
+  out_cat_only: YES
 
 ###############################################
 # Catalog setting
@@ -71,6 +71,8 @@ obs_setting:
   pointing_dir: "/public/share/yangxuliu/CSSOSDataProductsSims/data_50sqDeg"
   pointing_file: "pointing_50_combined.dat"
 
+  obs_config_file: "/public/home/fangyuedong/project/csst-simulation/config/obs_config_SCI_WIDE_phot.yaml"
+
   # Run specific pointing(s):
   # - give a list of indexes of pointings: [ip_1, ip_2...]
   # - run all pointings: null