By using the present technologies of database and information integration, in accordance with the status quo and reality demands of test system, the paper analyzes and discusses the information integration problems of synthetic test system. Two kinds of solutions are put forward, one is data conversion based on database technology, and the other is information exchange based on XML. The corresponding implementation methods are given out, furthermore, the information integration of test system is designed by using these methods. Among them, the former is relatively easy and convenient to implement and the latter has wider universality.