diff --git a/csst_dfs_api_cluster/msc/__init__.py b/csst_dfs_api_cluster/msc/__init__.py
index 1fd02d8db240adc400354f658c3ba6f2c9941ae5..0f45f6e43fd19408446ce793d4944cb5a7029da6 100644
--- a/csst_dfs_api_cluster/msc/__init__.py
+++ b/csst_dfs_api_cluster/msc/__init__.py
@@ -1 +1,2 @@
-from .level1 import Level1DataApi
\ No newline at end of file
+from .level1 import Level1DataApi
+from .level2catalog import Level2CatalogApi
\ No newline at end of file
diff --git a/csst_dfs_api_cluster/msc/level2catalog.py b/csst_dfs_api_cluster/msc/level2catalog.py
new file mode 100644
index 0000000000000000000000000000000000000000..b98c08f0604dbcbe548ce4b3a4220e22b76884b7
--- /dev/null
+++ b/csst_dfs_api_cluster/msc/level2catalog.py
@@ -0,0 +1,75 @@
+import grpc
+import datetime
+
+from csst_dfs_commons.models import Result
+from csst_dfs_commons.models.common import from_proto_model_list
+from csst_dfs_commons.models.msc import MSCLevel2CatalogRecord
+from csst_dfs_commons.models.constants import UPLOAD_CHUNK_SIZE
+from csst_dfs_proto.msc.level2catalog import level2catalog_pb2, level2catalog_pb2_grpc
+
+from ..common.service import ServiceProxy
+from ..common.utils import *
+
+class Level2CatalogApi(object):
+    """
+    Level2Catalog Data Operation Class
+    """    
+    def __init__(self):
+        self.stub = level2catalog_pb2_grpc.Level2CatalogSrvStub(ServiceProxy().channel())
+
+    def find(self, **kwargs):
+        ''' retrieve level2catalog records from database
+
+        parameter kwargs:
+            obs_id: [str]
+            detector_no: [str]
+            ra:  [float] in deg
+            dec: [float] in deg
+            radius:  [float] in deg   
+            min_mag: [float]
+            max_mag: [float]
+            obs_time: (start, end),
+            limit: limits returns the number of records,default 0:no-limit
+
+        return: csst_dfs_common.models.Result
+        '''
+        try:
+            resp, _ =  self.stub.Find.with_call(level2catalog_pb2.FindLevel2CatalogReq(
+                obs_id = get_parameter(kwargs, "obs_id"),
+                detector_no = get_parameter(kwargs, "detector_no"),
+                obs_time_start = get_parameter(kwargs, "obs_time", [None, None])[0],
+                obs_time_end = get_parameter(kwargs, "obs_time", [None, None])[1],
+                ra = get_parameter(kwargs, "ra"),
+                dec = get_parameter(kwargs, "dec"),
+                radius = get_parameter(kwargs, "radius"),
+                minMag = get_parameter(kwargs, "min_mag"),
+                maxMag = get_parameter(kwargs, "max_mag"),
+                limit = get_parameter(kwargs, "limit", 0)
+            ),metadata = get_auth_headers())
+
+            if resp.success:
+                return Result.ok_data(data=from_proto_model_list(MSCLevel2CatalogRecord, resp.records)).append("totalCount", resp.totalCount)
+            else:
+                return Result.error(message = str(resp.error.detail))
+
+        except grpc.RpcError as e:
+            return Result.error(message="%s:%s" % (e.code().value, e.details))
+
+    def write(self, records):
+        ''' insert a level2catalog records into database
+ 
+        parameter kwargs:
+            records : list[str]
+         
+        return csst_dfs_common.models.Result
+        '''   
+        try:
+            
+            resp,_ = self.stub.Write.with_call(level2catalog_pb2.WriteLevel2CatalogReq(records = records),metadata = get_auth_headers())
+
+            if resp.success:
+                return Result.ok_data()
+            else:
+                return Result.error(message = str(resp.error.detail))
+        except grpc.RpcError as e:
+            return Result.error(message="%s:%s" % (e.code().value, e.details))