The present disclosure relates to the field of unmanned aerial vehicles (UAV), and discloses a gimbal control method, a controller, an unmanned aerial vehicle and an unmanned aerial vehicle inspection system. The gimbal control method, applied to a UAV, acquires inspection information about the UAV, including an observation flight leg, an observation interval corresponding to the observation flight leg, a total flight range corresponding to the observation interval and the current flight range. Then, the observation progress of the UAV is determined according to the current flight range and the total flight range. A first position, position of center point of the field of view of the nacelle of UAV, is determined according to the observation progress and the observation interval. Finally, the angle of the gimbal of the UAV is controlled according to the first position and the current position of the UAV.