Laboratory research and development of software products and industry very closely linked, according to the actual experience of constantly revised and improved. Throughout the development to the application process is a continuous feedback to improve the cycle. As customers face a lack of knowledge of software applications, and team members lack knowledge of relevant industry background, so the demand process will generate demand for staff and customers understand the deviations occur on demand [5]. Although the customer has a wealth of industry knowledge, management and application of the actual management of the system there are still some differences, the. client can't clear the actual demand in the short period of time, or even give an error need. It is difficult to determine the needs of the identified needs for the project features a frequently changing; it requires that the team can respond quickly to changes in demand and in short time delivery. The. Test requirements change frequently put forward higher requirements, the need for rapid response to changes in demand, _ purpose of blood testing period is short, the efficiency of the test also raised higher requirements