Aimed at the current situation of army's communication equipment failure recovery, a new kind of electronic handbook of communication equipment failure recovery based on .NET is designed. The system uses .NET surroundings and Access data base and the core components of ADO.NET to realize the functions of user management and fault information management and data maintenance and so on. This paper firstly analyses the system's overall framework and system function. Then, it elaborates the system's key technology. Finally, it proves the validity of the system through general use.