The invention belongs to the technical field of unmanned aerial vehicles, and particularly relates to an unmanned aerial vehicle and a battery temperature control system and method thereof. The temperature of a battery module under the working state of the unmanned aerial vehicle is monitored in real time, and the flow direction and the airflow intensity of the internal heat dissipation airflow ofthe unmanned aerial vehicle are controlled according to the monitored temperature value of the battery module. When the temperature value of the battery module is low, the battery module is heated bythe heat dissipation airflow of the unmanned aerial vehicle, and when the temperature value of the battery module is high, the heat dissipation airflow is increased to help the battery module to dissipate heat quickly; and when the temperature value of the battery module is too low or too high, the temperature abnormal alarm is reported back to an operator of the unmanned aerial vehicle, and theunmanned aerial vehicle is controlled to return or land when the battery module temperature value is too low to avoid air crash accidents.