In order to solve the difficult data-managed problem by the application of the independent CAX system, which are the lack of effective communication, and produce a large amount of data with different types, a PDM system based on Web technology is developed with C # language. Using object-oriented technology and UML modeling method, each module of the system is analyzed, and is modeled with case diagram. The software system is divided into 6 levels, various document functions, such browsing, comments, searching, measurement and comparison, are realized when AutoVue control inserted, windows client is embedded into a DocumentForm. For a security access, the tables of the physical address and IP address are established. At present, the system has been installed and operated in a medium-sized military enterprise local area network (LAN), and the design data centralized management has been achieved, the efficiency and quality of developing produce have been greatly improved.