The invention relates to the technical field of unmanned aerial vehicle endurance, and discloses a charging 
system and a charging method for a 
plant protection unmanned aerial vehicle. The 
system comprises a general 
control unit, a parking 
station, an airborne terminal, a distance triggering module, an idle detection unit, a remote terminal, a scheduling mechanism, and a priority determination unit. When the idle detection unit detects that a parking apron corresponding to the unmanned aerial vehicle is idle in the stop 
station, the unmanned aerial vehicle which comes to be charged is guided to land on the idle parking apron, and when the idle detection unit detects that no parking apron corresponding to the specification of the unmanned aerial vehicle is idle, the general 
control unit executes different operations according to the priority judged by the priority determination unit, wherein the execution operations are that the unmanned aerial vehicle with the high priority is charged preferentially. According to the invention, waste of 
waiting time for charging of the unmanned aerial vehicle is reduced to the maximum extent, the 
utilization rate of charging equipment is improved, and the operation 
punctuality of the unmanned aerial vehicle is also improved to the maximum extent.