diff --git a/README.md b/README.md
index 22ef616..54ae546 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,72 @@
-# osschat-search
+# ElasticSearch Search
 
+*author: Jael*
+
+<br />
+
+## Description
+
+The search operator runs a search via ElasticSearch client given a query.
+It takes a dictionary as input, which should be written in [Query DSL](https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html).
+To use this operator, you need to [set up ElasticSearch](https://www.elastic.co/guide/en/elasticsearch/reference/current/setup.html) in advance.
+
+<br />
+
+## Code Example
+
+With an example ElasticSearch client 'localhost:9200',
+search across the index 'test_index' using an example query `{'match_all': {}}` to get all documents.
+
+```python
+from towhee import pipe, ops, DataCollection
+
+
+query = {'match_all': {}}
+es_search = (
+    pipe.input('index_name', 'query')
+        .map(('index_name', 'query'), 'res', ops.elasticsearch.search_client(
+            host='localhost', port=9200
+        ))
+        .output('query', 'res')
+)
+
+res = es_search('test_index', query)
+DataCollection(res).show() # Optional: display output data
+```
+
+<br />
+
+## Factory Constructor
+
+Create the operator via the following factory method:
+
+***elasticsearch.search(host='localhost', port=9200, user=None, password=None, ca_certs=None)***
+
+**Parameters:**
+
+***host***: *str*
+
+The host to connect ElasticSearch client.
+
+***port***: *int*
+
+The port to connect ElasticSearch client.
+
+***user***: *str*
+
+The username to connect ElasticSearch client if needed, defaults to None.
+
+***password***: *str*
+
+The user password to connect ElasticSearch client if needed, defaults to None.
+
+***ca_certs***: *str*
+
+The path to CA certificates to connect ElasticSearch client if needed, defaults to None.
+
+
+<br />
+
+**Returns:**
+
+Search results wrapped by `elastic_transport.ObjectApiResponse`.
diff --git a/__init__.py b/__init__.py
new file mode 100644
index 0000000..3d50b15
--- /dev/null
+++ b/__init__.py
@@ -0,0 +1,4 @@
+from .es_search import ESSearch
+
+def osschat_search(*args, **kwargs):
+    return ESSearch(*args, **kwargs)
\ No newline at end of file
diff --git a/es_search.py b/es_search.py
new file mode 100644
index 0000000..237af6a
--- /dev/null
+++ b/es_search.py
@@ -0,0 +1,44 @@
+import logging
+from typing import Union, List
+
+from elasticsearch import Elasticsearch
+# import elasticsearch.helpers # type: ignore
+
+from towhee.operator import PyOperator, SharedType # type: ignore
+
+
+logger = logging.getLogger()
+
+
+class ESSearch(PyOperator):
+    """
+    Search using ElasticSearch with client ready
+
+    Args:
+        host (`str`): host to connect ElasticSearch client
+        port (`int`): port to connect ElasticSearch client
+        user (`str=None`): user name to connect ElasticSearch client, defaults to None
+        password (`str=None`): user password to connect ElasticSearch client, defaults to None
+        ca_certs (`str=None`): path to CA certificate, defaults to None
+    """
+    def __init__(self, host: str, port: int, user: str = None, password: str = None, ca_certs: str = None):
+        super().__init__()
+        try:
+            self.client = Elasticsearch(
+                f'https://{host}:{port}',
+                ca_certs=ca_certs,
+                basic_auth=(user, password))
+            logger.info('Successfully connected to ElasticSearch client.')
+        except Exception as e:
+            logger.error('Failed to connect ElasticSearch client:\n', e)
+            raise e
+
+    def __call__(self, index_name: str, query: dict = {'match_all': {}}, enable: bool=True):
+        if not enable:
+            return None
+        resp = self.client.search(index=index_name, query=query)
+        return resp
+
+    @property
+    def shared_type(self):
+        return SharedType.NotShareable