Electronic device, signal switching method and power supply method

The embodiment of the invention discloses an electronic device, a signal switching method and a power supply method, and the electronic device with a connector supporting multiple connection standards comprises the connector, a first multi-task circuit, a processor and a controller. The connector comprises a detection pin and at least one signal pin. The first multi-task circuit is coupled to the at least one signal pin. The processor is coupled to the first multi-task circuit. The controller monitors the detection pin. The first multi-task circuit electrically connects the at least one signal pin to the controller. When the detection pin monitors the occurrence of a hot plug signal, the controller sends a confirmation instruction to the at least one signal pin through the first multi-task circuit so as to request to reply a device signal. When a device signal is received, the controller controls the first multi-task circuit to electrically connect the at least one signal pin to the processor or the controlle