The invention relates to an electronic device, comprising a first power supply contact, a second power supply contact and a control unit; wherein, the first power supply contact is electrically connected with the positive terminal a voltage source, the second power supply contact is electrically connected with the negative terminal the voltage source, and the control unit is electrically connectedwith the first power supply contact and the second power supply contact, thus forming a signal transmission path and receiving power supply of the voltage source. When the control unit is executed ina test mode, the control unit completes open and close operation according to instruction in a preset instruction set, thereby changing a current waveform signal transmitted in the signal transmission path. Thus, the aim of convenient test and high test efficiency is achieved.