Integrated air and missile defense (IAMD) system-of-systems (SoS) is the basic form of the integration of heterogeneous air defense forces,and plays an important role in the future air and space defense operations.Firstly,based on the reasons and objectives of the construction of IAMD,it is pointed out that the construction idea of the IAMD is decoupling the weapon systems and dynamic reorganization of the elements.Secondly,the overall architecture of the system is analyzed,and the core functions of the two key systems integrated battle command system (IBCS) and integrated fire control network (IFCN) are studied.Thirdly,the test situation and ability evolvement of the SoS are reviewed systematically,the construction emphases and development trend are discussed.Finally,the inspiration and suggestion of our army system construction are put forward.The research results show that the US Army has initially possessed the capability of distributed and networked air and missile defense operations.