The invention relates to the field of electric devices, and further relates to the field of power supplies, in particular to a socket capable of realizing a complete outage after an electric device is shut down. The socket comprises a power leading-in end, an equipment power supply end and a controllable switch device which can maintain the switch-on state after switch-on, wherein the controllable switch device is located between the power leading-in end and the equipment power supply end, the controllable switch device can be a field-effect tube, or a triode, or a relay and comprises a switch-on signal leading-in end used for inputting a switch-on signal, and the controllable switch device does not allow current to pass through when no current exists, and then energy waste is avoided. When power needs to be supplied to electric equipment, an electric signal output switch of an auxiliary power supply is turned on to supply power to the switch-on signal leading-in end of the controllable switch device and provide a switch-on signal, and then the controllable switch device is turned on, so that current passes through the controllable switch device to supply power to the electric equipment.