Abstract: The command, control and battle management (C2BM) system for missile defense system is studied. The command, control, battle management and communication system for american missile defense system is introduced, including the brief status, the functional components and the future development emphases. The C2BM system scheme is proposed, which consist of 4 sub-systems: data fusion, coordinated battle management, integrated command and control, support system, and addressed the sub-system function. The 4 key technologies are analyzed for the C2BM system0s development, which are the battle situation awareness, the multi-source data fusion and trajectory forecasting, the interception coordinated battle management, the resources optimized con¯guration and dynamic programming.