The invention discloses an unmanned aerial vehicle (UAV) earth station power on method and device and an unmanned aerial vehicle (UAV) earth station. The method comprises the following steps: according to stored starting time of modules to be triggered, a triggering sequence of the modules to be triggered and corresponding triggering time are determined; when the triggering time comes, triggeringsignals are transmitted to corresponding modules to be triggered, and therefore the modules to be triggered can be triggered to be started. Via use of the unmanned aerial vehicle (UAV) earth station power on method and device and the unmanned aerial vehicle (UAV) earth station, power consumption caused during unmanned aerial vehicle (UAV) earth station power on processes can be lowered.