The invention discloses a micro single board type UAV (unmanned aerial vehicle) system with a suction function and a control method thereof. The UAV system comprises a micro single board type UAV and a ground monitoring station, wherein the micro single board type UAV comprises a single-PCB type vehicle body, a flight control module, a vehicle-mounted radio frequency communication module, a knob type suction cup and at least four groups of flight mechanisms, the flight control module, the vehicle-mounted radio frequency communication module and the flight mechanisms are fixed on the single-PCB type vehicle body, and a knob of the knob type suction cup is fixed on the upper end surface of the single-PCB type vehicle body. The micro single board type UAV firstly flies vertically upwards until a suction cup body of the knob type suction cup sucks a plane where the suction cup body is required to be fixed and then clockwise yaws for 180 degrees when receiving a suction command; the micro single board type UAV counterclockwise yaws for 180 degrees when receiving a release command. The system is simple in structure and convenient to use, the UAV can finish operations such as suction, release and the like by yawing for the certain angle only, and mechanisms such as a steering engine, a mechanical arm and the like are not required to be operated.