The satellite mobile network is a sky-based communication network whose basic physical architecture is satellite constellation, and it covers the global areas with the communication links between the satellites. The satellite mobile network gives great impetuses to social development, scientific and technical advancement and military normalization, and it gives enormous challenge to the researchers because of the mobile character of the sky-network, the unmeant disconnection of the communication, the complexity of the access, and the integration of the use. It is necessary to use the general concept design simulation to validate general requirement, general project, key technical guideline, and resourceful restrictive condition, and then to form a scientific feasibility report. This paper introduces the general concept of the satellite mobile network, and designs a platform that aims at the simulation of the sky-network, and gains the data of the general concept design simulation of the satellite mobile network with some examples.