Power supply equipment capable of performing communication by using USB interface

The invention relates to power supply equipment capable of performing communication by using a USB interface. The power supply equipment acquires the type, capacity information, service time or electric quantity information of electronic equipment connected with the power supply equipment through the USB interface, and a charging mode, which is the most appropriate for the electronic equipment, is determined according to the information of the electronic equipment. The power supply equipment, which realizes data communication by using a DC power supply line, overcomes a problem that power supply equipment in the market at present cannot perform data transmission, increases data interaction between the power supply equipment and an electronic product in the power supply process, and improves safety coefficient of the power supply equipment.