The command and control(C2)system network has varieties of equipment and complex network managementand fault diagnosis becomes difficult.Thereforeit is proposed to combine the Prognostics and Health Management (PHM) technology with network management technology and apply it in C2 system for network security.The realization of the health assessment and fault prediction in the network can enhance the reliability of the system.This paper focuses on the construction of the PHM system and its management mode.The function of each module is described and the process of network health assessment is introduced.Thenthrough the acquisition and statistical analysis of the performance index of a certain networkthe validity of the health assessment and fault prediction technology in network test is verified.Finallythe function and significance of PHM in the healthy operation of the system network to ensure the communication of the battlefield is summarized.