In order to solve the problem of large amount of resources and long development term in the development process for military communication system, the method with PERT networks scheming the realization of military communication system is advanced. According to different function of each task during development process for military communication system, it falls into three phases including seedtime, development-time and test and check and acceptance-time. The thesis makes use of PERT networks to arrange the various resources and calculate time of task accomplishment. The result indicates that the method can shorten development term and improve efficiency