diff --git a/README.md b/README.md
index 56c4a2b65c036c76af903d160c880850ec800e77..73640e50ba3aac3cdb22efacd86191f326d3d826 100644
--- a/README.md
+++ b/README.md
@@ -9,6 +9,9 @@ This package provides APIs to access csst's files and databases in your localize
 This library can be installed with the following command: 
 
 ```bash
+git clone https://github.com/astronomical-data-processing/csst-dfs-api-local.git
+cd csst-dfs-api-local
+pip install -r requirements.txt
 python setup.py install
 ```
 
diff --git a/csst_dfs_api_local/common/__init__.py b/csst_dfs_api_local/common/__init__.py
index e69de29bb2d1d6434b8b29ae775ad8c2e48c5391..a45b30a5f732d9ec81756434cced36116d340319 100644
--- a/csst_dfs_api_local/common/__init__.py
+++ b/csst_dfs_api_local/common/__init__.py
@@ -0,0 +1 @@
+from .catalog import CatalogApi
\ No newline at end of file
diff --git a/csst_dfs_api_local/common/catalog.py b/csst_dfs_api_local/common/catalog.py
index da37b362a8fb4767715b79eb98b61e460d3a16c0..e01736493b5bcfd9ae34f075c9258c4adf00214e 100644
--- a/csst_dfs_api_local/common/catalog.py
+++ b/csst_dfs_api_local/common/catalog.py
@@ -1,18 +1,31 @@
-from urllib import request
+import urllib
 import json
+from csst_dfs_commons.models import Result
 
 class CatalogApi(object):
     def __init__(self):
         self.data = []
-        self.url = 'http://172.31.248.218:30180/search/v2'
+        self.url = r'http://csst.astrolab.cn:30180/search/v2'
     
     def gaia3_query(self, ra: float, dec: float, radius: float, min_mag: float,  max_mag: float,  obstime: int, limit: int):
-        req = request.Request(url = self.url, method="post")
-        req.add_header('Content-Type', 'application/json')
-        data = { "ra":ra, "dec":dec, "radius":radius, "min_mag": min_mag, "max_mag": max_mag, "obstime": obstime, "limit": limit}
-        data = json.dumps(data)
-        data = data.encode()
-        res = request.urlopen(req, data=data)
-        content = res.read()
-        print(content)
-        return content
\ No newline at end of file
+        data = { "ra":ra, "dec":dec, "radius":radius, "catalog_name": "gaia3", "min_mag": min_mag, "max_mag": max_mag, "obstime": obstime, "limit": limit}
+        return self.rest_request(data)
+    
+    def rest_request(self, data):
+        try:
+            Headers = {"Content-type": "application/x-www-form-urlencoded"}
+
+            data = urllib.parse.urlencode(data).encode("utf-8") 
+            req =  urllib.request.Request(self.url,data,Headers)
+            response = urllib.request.urlopen(req, timeout=30)
+            html = response.read().decode("utf-8") 
+            resp = json.loads(html)
+
+            if resp["code"] == 0:
+                return Result.ok_data(data=resp["data"]).append("totalCount", resp["object"]["totalCount"])
+            else:
+                return Result.error(message = resp.message)
+
+        except Exception as e:
+            return Result.error(message=repr(e))        
+       
\ No newline at end of file
diff --git a/csst_dfs_api_local/ifs/fits.py b/csst_dfs_api_local/ifs/fits.py
index 838c8d7388faaa9fc705a9d8196f0b37232d5f46..4e4514e27880cc94190c6716327e6ce4a04a4845 100644
--- a/csst_dfs_api_local/ifs/fits.py
+++ b/csst_dfs_api_local/ifs/fits.py
@@ -12,6 +12,7 @@ from astropy.io import fits
 
 from ..common.db import DBClient
 from ..common.utils import *
+from csst_dfs_commons.models import Result
 
 log = logging.getLogger('csst')
 class FitsApi(object):
@@ -36,9 +37,10 @@ class FitsApi(object):
             exp_time = (start, end),
             ccd_num = [int],
             qc0_status = [int],
-            prc_status = [int]
+            prc_status = [int],
+            limit: limits returns the number of records
 
-        return list of raw records
+        return: csst_dfs_common.models.Result
         '''
         paths = []
         
@@ -48,28 +50,40 @@ class FitsApi(object):
         ccd_num = get_parameter(kwargs, "ccd_num")
         qc0_status = get_parameter(kwargs, "qc0_status")
         prc_status = get_parameter(kwargs, "prc_status")
-        
-        sql = []
-
-        sql.append("select * from ifs_rawfits where exp_time<='" + exp_time[1]+"'")
-
-        if exp_time[0] is not None:
-            sql.append(" and exp_time>='" + exp_time[0] + "'")
-        if obs_time is not None:
-            sql.append(" and obs_time=" + obs_time)
-        if ccd_num is not None:
-            sql.append(" and ccd_num=" + ccd_num)
-        if qc0_status is not None:
-            sql.append(" and qc0_status=" + qc0_status) 
-        if prc_status is not None:
-            sql.append(" and prc_status=" + prc_status)
-        
-        if file_name:
-            sql = ["select * from ifs_rawfits where filename='" + file_name + "'"]
-        _, recs = self.db.select_many("".join(sql))
-        for r in recs:
-            r['file_path'] = os.path.join(self.root_dir, r['file_path'])
-        return recs
+        limit = get_parameter(kwargs, "limit", 0)
+        limit = to_int(limit, 0)
+
+        try:
+            
+            sql = []
+
+            sql.append("select * from ifs_rawfits where exp_time<='" + exp_time[1]+"'")
+
+            if exp_time[0] is not None:
+                sql.append(" and exp_time>='" + exp_time[0] + "'")
+            if obs_time is not None:
+                sql.append(" and obs_time=" + repr(obs_time))
+            if ccd_num is not None:
+                sql.append(" and ccd_num=" + repr(ccd_num))
+            if qc0_status is not None:
+                sql.append(" and qc0_status=" + repr(qc0_status)) 
+            if prc_status is not None:
+                sql.append(" and prc_status=" + repr(prc_status))
+            if limit > 0:
+                sql.append(f" limit {limit}")
+            
+            if file_name:
+                sql = ["select * from ifs_rawfits where filename='" + file_name + "'"]
+
+            totalCount = self.db.select_one("".join(sql).replace("select * from","select count(*) as v from"))
+
+            _, recs = self.db.select_many("".join(sql))
+            for r in recs:
+                r['file_path'] = os.path.join(self.root_dir, r['file_path'])
+
+            return Result.ok_data(data=recs).append("totalCount", totalCount['v'])
+        except Exception as e:
+            return Result.error(message=e.message)
 
     def get(self, **kwargs):
         '''
@@ -78,12 +92,15 @@ class FitsApi(object):
 
         return dict or None
         '''
-        fits_id = get_parameter(kwargs, "fits_id", -1)
-        r = self.db.select_one(
-            "select * from ifs_rawfits where id=?", (fits_id,))
-        if r:
-            r['file_path'] = os.path.join(self.root_dir, r['file_path'])
-        return r
+        try:
+            fits_id = get_parameter(kwargs, "fits_id", -1)
+            r = self.db.select_one(
+                "select * from ifs_rawfits where id=?", (fits_id,))
+            if r:
+                r['file_path'] = os.path.join(self.root_dir, r['file_path'])
+            return Result.ok_data(data=r)
+        except Exception as e:
+            return Result.error(message=e.message)
 
     def read(self, **kwargs):
         '''
diff --git a/csst_dfs_api_local/ifs/reffits.py b/csst_dfs_api_local/ifs/reffits.py
index 2fe7585c1ba7f2907c2ddfbd04c0616454d77ab2..5979cfe3c2e36a9e8a5eb331f4818b31d712223a 100644
--- a/csst_dfs_api_local/ifs/reffits.py
+++ b/csst_dfs_api_local/ifs/reffits.py
@@ -56,13 +56,13 @@ class RefFitsApi(object):
         if exp_time[0] is not None:
             sql.append(" and exp_time>='" + exp_time[0] + "'")
         if obs_time is not None:
-            sql.append(" and obs_time=" + obs_time)
+            sql.append(" and obs_time=" + repr(obs_time))
         if ccd_num is not None:
-            sql.append(" and ccd_num=" + ccd_num)
+            sql.append(" and ccd_num=" + repr(ccd_num))
         if ref_type is not None:
             sql.append(" and ref_type='" + ref_type + "'")           
         if status is not None:
-            sql.append(" and status=" + status)
+            sql.append(" and status=" + repr(status))
 
         if file_name:
             sql = ["select * from ifs_ref_fits where filename='" + file_name + "'"]
diff --git a/requirements.txt b/requirements.txt
index 9f02d2e0150e1207e8c15988894301e454558672..ac7c2900d9d64ab5468d10a454ed6e8cb60900b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1 +1,3 @@
-DBUtils==1.3
\ No newline at end of file
+DBUtils==1.3
+astropy>=4.0
+git+https://github.com/astronomical-data-processing/csst-dfs-commons.git
\ No newline at end of file
diff --git a/setup.cfg b/setup.cfg
index 473ec0932199e23f5d855f9d54c6c027920964a4..7e465db5c398f3968e25f613dd27d8b861523d53 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -20,7 +20,7 @@ packages = find:
 python_requires = >=3.7
 zip_safe = False
 setup_requires = setuptools_scm
-install_requires =
+install_requires = 
     astropy>=4.0
     DBUtils==1.3
 [options.package_data]
diff --git a/tests/test_common_catalog.py b/tests/test_common_catalog.py
index ca8e64211fcd7f694922628aacf76857a9307584..9cc4ad8b41399e7fccfef7ae5dbd63dc4b3c7764 100644
--- a/tests/test_common_catalog.py
+++ b/tests/test_common_catalog.py
@@ -10,5 +10,5 @@ class CommonEphemTestCase(unittest.TestCase):
         self.api = CatalogApi()
 
     def test_gaia3_query(self):
-        recs = self.api.gaia3_query(ra=260, dec=-27, radius=0.01, min_mag=-1, max_mag=-1, obstime=-1, limit=2)
-        print('find:', recs)
\ No newline at end of file
+        result = self.api.gaia3_query(ra=56.234, dec=14.4665, radius=1, min_mag=-1, max_mag=-1, obstime=-1, limit=2)
+        print('return:', result)
\ No newline at end of file