In order to solve the problems involving lack of the application system architecture and the heterogeneous data integration and share in the security system construction of military rear depot, a four layer security system for military rear depot is constructed based on SOA. The system provides the standardized construction using SOA, establishes a comprehensive service data exchange system based on the Web component technology in the application system, realizes isomerism data exchange and data share, and achieves security subsystem integration in military rear depot. The system possesses the good extendibility and the maintainability.