To solve directing and adjusting systems only displaying the real-time mission image, not accomplishing synchronous capturing and replaying to all sorts of image data, and not achieving auto switching in accordance with timing sequence to all kinds of scene, This thesis adopted many key technologies such as multi-video synchronous capture, live broadcast, synchronous replay and automatic procedure control, and designed a multi-channel video capturing & replaying system. This system can reappear scenes from multi projecting cameras after military simulating training task. This technology resolves the difficult problem that the commanders cannot analyze the procedures after military simulating training. This system effectively promotes the simulating training efficiency and poses significant reality and military meaning.