An unmanned aerial vehicle, an unmanned aerial vehicle control center and an unmanned aerial vehicle alarm method are provided. The unmanned aerial vehicle includes a motor and a control circuit board. The control circuit board is adapted to read a real-time drive current value and/or a real-time rotational speed value of the motor and transmitting warning related information. The unmanned aerial vehicle control center is adapted to conduct a warning according to the warning related information and adapted to a backup and storage of data. The unmanned aerial vehicle alarm method includes that the unmanned aerial vehicle is made to read the real-time drive current value and/or the real-time rotational speed value at the time of a motor operation and to transmit the warning related information to the unmanned aerial vehicle control center.
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