Abstract: This paper describes related technologies used by the existing mainstream automated test systems,and proposed and designed a keyword-driven NP automated testing system with pre-configuration constraints testing case automatic generation algorithm.The system realized all procedure from the automatic generation of case, automatically generate the test sequence,and automatically performs the test to the output test results automatically.By actually contrast applications,due to the technology of test case automatic generation,the system significantly improved test efficiency and ability of problem-detection than the original test system.