Abstract: Herein disclosed is an error warning module, installed in an electronic device, comprising a detection unit and a processing unit. The detection unit detects a current or a voltage being transmitted by the electronic device to generate a current detection signal or a voltage detection signal. The processing unit, electrically connected to the detection unit, determines whether a current detection value indicated by the current detection signal exceeds a current setting range, or whether a voltage detection value indicated by the voltage detection signal exceeds a voltage setting range. When the current detection value exceeds the current setting range or the voltage detection value exceeds the voltage setting range, the processing unit generates a warning signal.