The invention discloses an unmanned aerial vehicle projection method and system. The unmanned aerial vehicle projection method comprises the steps of: carrying out communication connection on an unmanned aerial vehicle and a ground terminal; uploading multimedia information to the unmanned aerial vehicle by the ground terminal, and enabling the unmanned aerial vehicle to utilize an onboard projector to carry out projection playing. In the mode, according to the unmanned aerial vehicle projection method and system disclosed by the invention, words, images or videos or voice and the like uploaded to the unmanned aerial vehicle by the ground terminal can be displayed and played in real time, so that the unmanned aerial vehicle has projection and voice functions and has higher entertainment.