To speed up the pace of the construction on air and space defense command and control/battle management and communications (C2BMC) system, the paper analyzes the components and characters of the C2BMC US system; it also analyzes the position and function of US C2BMC system. Then, research on the 8 key techniques which are used in US C2BMC system. At last, the important revelation which are top-level design, theoretical research, key technology and conditions building on modeling verification, the design of command and control structure for construction on air and space defense C2BMC system have obtained from them. The research provides the reference for the construction of the air and space defense C2BMC system.