The inland traditional measuring vessel is restricted by manpower，material resources，time and draft，etc.，and it leads to the channel information timeliness and the measurement can’t be conducted in the shallow area.So，we design a channel measuring system based on unmanned vessel for the inland，which carries digital sounding device，RTK，GPS，acoustic doppler velocity profiler (ADCP)，to realize the measurement of the depth and flow velocity of channel，and transfer measuring data to the measuring center using the wireless communication net.The application of the unmanned vessel for inland river channel measurement is an important attempt for the inland river channel measurement.