Abstract: Based on MCU control various function modules, making a kind of figure transmission, message collection and remote control system by 3G net and micro-power Ad hoc Network. This system can use Internet, 3G, wireless WIFI Ad hoc network monitor field or collect data,and can control electrical equipments by power line carrier. Every system uses modular design. According to the need, a new system can be established. hhis article introduce this system and working flow.

Key words: 3G, Video transmission, Ad hoc network, Remote control