1. An autonomous navigation method of an unmanned aerial vehicle, comprising: controlling the unmanned aerial vehicle to take off and collecting videos of a scene corresponding to the unmanned aerial vehicle at each collection time point; obtaining feature points in the videos of the scene corresponding to each collection time point; generating a flight path of the unmanned aerial vehicle according to the feature points in the videos of the scene corresponding to each collection time point; generating a first map model according to the flight path of the unmanned aerial vehicle and the videos of the scene corresponding to each collection time point; and carrying out autonomous navigation on the unmanned aerial vehicle according to the first map model; wherein controlling the unmanned aerial vehicle to take off comprises: controlling the unmanned aerial vehicle to take off in a manual control mode, if the unmanned aerial vehicle has a monocular camera; controlling the unmanned aerial vehicle to take off in an autonomous control mode, if the unmanned aerial vehicle has a stereo camera.