The utility model discloses an automatically, compile all protocol conversion devices of decoding device suitable for intelligence light territory management system, the structure comprises an indoor device and an outdoor device. Outdoor equipment includes compass navigation satellite system, handheld terminal and fixed big dipper satellite navigation module, the inside plant includes big dipper protocol conversion host computer, data transmission device and intelligence light territory management system platform server, intelligence light territory management system platform server passes through data transmission device and is connected with the foundation of big dipper protocol conversion host computer, big dipper protocol conversion host computer is establish with fixed big dipper satellite navigation module and is connected, fixed big dipper satellite navigation module is establish the satellite through the satellite signal that beidou navigation system provided with handheld terminal and is connected. The technical scheme of the utility model can realize national domestic all standing, the non -blind area, not influenced by the weather condition, do not rely on the operator, the reliability is high, big dipper satellite is china's independent development, and the security is high.