The unmanned helicopter system is disclosed. The unmanned helicopter systems, ground platform for sensing the chopper target mounted on the unmanned helicopter by calculating navigation information of the unmanned helicopter, and transmits the control information including the calculated navigation information and the location information of the ground target for unmanned helicopter, and and imaging the target surface by calculating a ground target position, and on the basis of the calculated target position and a transmission control information generating drive information, including the unmanned helicopter for driving according to the generated drive information.