diff --git a/ate/__init__.py b/ate/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/ate/exception.py b/ate/exception.py
new file mode 100644
index 00000000..6c747377
--- /dev/null
+++ b/ate/exception.py
@@ -0,0 +1,16 @@
+#coding: utf-8
+from termcolor import colored
+
+class MyBaseError(BaseException):
+    def __init__(self, msg):
+        self.msg = msg
+        self.color_msg = colored(msg, 'red', attrs=['bold'])
+
+    def __repr__(self):
+        return self.msg
+
+    def __str__(self):
+        return self.color_msg
+
+class ParamsError(MyBaseError):
+    pass
diff --git a/ate/utils.py b/ate/utils.py
new file mode 100644
index 00000000..e5ebb75c
--- /dev/null
+++ b/ate/utils.py
@@ -0,0 +1,22 @@
+import json
+import yaml
+import os.path
+from ate.exception import ParamsError
+
+def load_yaml_file(yaml_file):
+    with open(yaml_file, 'r+') as stream:
+        return yaml.load(stream)
+
+def load_json_file(json_file):
+    with open(json_file) as data_file:
+        return json.load(data_file)
+
+def load_testcases(testcase_file_path):
+    file_suffix = os.path.splitext(testcase_file_path)[1]
+    if file_suffix == '.json':
+        return load_json_file(testcase_file_path)
+    elif file_suffix in ['.yaml', '.yml']:
+        return load_yaml_file(testcase_file_path)
+    else:
+        # '' or other suffix
+        raise ParamsError("Bad testcase file name!")
diff --git a/test/data/demo.json b/test/data/demo.json
new file mode 100644
index 00000000..f011c9ed
--- /dev/null
+++ b/test/data/demo.json
@@ -0,0 +1,43 @@
+[
+    {
+        "name": "create user which does not exist",
+        "request": {
+            "url": "http://127.0.0.1:5000/api/users/1000",
+            "method": "POST",
+            "headers": {
+                "content-type": "application/json"
+            },
+            "cookies": {},
+            "json": {
+                "name": "user1",
+                "password": "123456"
+            }
+        },
+        "response": {
+            "status_code": 201,
+            "headers": {
+                "Content-Type": "application/json"
+            }
+        }
+    },
+    {
+        "name": "create user which existed",
+        "request": {
+            "url": "http://127.0.0.1:5000/api/users/1000",
+            "method": "POST",
+            "headers": {
+                "content-type": "application/json"
+            },
+            "json": {
+                "name": "user1",
+                "password": "123456"
+            }
+        },
+        "response": {
+            "status_code": 500,
+            "headers": {
+                "Content-Type": "application/json"
+            }
+        }
+    }
+]
\ No newline at end of file
diff --git a/test/data/demo.yml b/test/data/demo.yml
new file mode 100644
index 00000000..242663a4
--- /dev/null
+++ b/test/data/demo.yml
@@ -0,0 +1,29 @@
+-
+    name: create user which does not exist
+    request:
+        url: http://127.0.0.1:5000/api/users/1000
+        method: POST
+        headers:
+            Content-Type: application/json
+        json:
+            name: user1
+            password: 123456
+    response:
+        status_code: 201
+        headers:
+            Content-Type: application/json
+
+-
+    name: create user which existed
+    request:
+        url: http://127.0.0.1:5000/api/users/1000
+        method: POST
+        headers:
+            Content-Type: application/json
+        json:
+            name: user1
+            password: 123456
+    response:
+        status_code: 500
+        headers:
+            Content-Type: application/json
\ No newline at end of file
diff --git a/test/test_utils.py b/test/test_utils.py
new file mode 100644
index 00000000..e87007e5
--- /dev/null
+++ b/test/test_utils.py
@@ -0,0 +1,31 @@
+import os
+import unittest
+from ate import utils
+from ate import exception
+
+class TestUtils(unittest.TestCase):
+
+    def test_load_testcases_bad_filepath(self):
+        testcase_file_path = os.path.join(os.getcwd(), 'test/data/demo')
+        with self.assertRaises(exception.ParamsError):
+            utils.load_testcases(testcase_file_path)
+
+    def test_load_json_testcases(self):
+        testcase_file_path = os.path.join(os.getcwd(), 'test/data/demo.json')
+        testcases = utils.load_testcases(testcase_file_path)
+        self.assertEqual(len(testcases), 2)
+        self.assertIn('name', testcases[0])
+        self.assertIn('request', testcases[0])
+        self.assertIn('response', testcases[0])
+        self.assertIn('url', testcases[0]['request'])
+        self.assertIn('method', testcases[0]['request'])
+
+    def test_load_yaml_testcases(self):
+        testcase_file_path = os.path.join(os.getcwd(), 'test/data/demo.yml')
+        testcases = utils.load_testcases(testcase_file_path)
+        self.assertEqual(len(testcases), 2)
+        self.assertIn('name', testcases[0])
+        self.assertIn('request', testcases[0])
+        self.assertIn('response', testcases[0])
+        self.assertIn('url', testcases[0]['request'])
+        self.assertIn('method', testcases[0]['request'])