This paper analyses the applications, advantages and disadvantages of current testing tools. It designs an automatic testing tool named open ATF, that is web-UI friendly, easy to operate, and feature-targeted. It also presents a testing scheme about generating test and executing automatically case with multi-method and multi-step. Users can conveniently input the testcase data and expect result. Through applying it in testing the system of Guangzhou Metro AFC, the results show that it can improve the quality and efficiency of testing to a large degree, and save human resources and gurantee reliability.