An on-off apparatus and an electronic device are provided. The on-off apparatus includes: an AC input end, an AC output end, an on-off module, a first DC isolating component and a second DC isolating component. The on-off module includes a first pin, a second pin, a third pin, a fourth pin and a control pin. The third pin is connected to a DC power supply. The fourth pin is connected to ground. The control pin is configured to receive a control signal. The on-off module is configured to turn on or off a path between the third pin and the fourth pin under control of the control signal.