An electronic device is provided which includes a connector connected with an external electronic device, a plug connected with an external power source, a power supply circuit that supplies power to the external electronic device through the connector, a first charging module configured to receive first protocol-related charging request information and change a charging voltage and a charging current of the power supply circuit based on the charging request information, a second charging module configured to receive second protocol-related charging request information from the external electronic device, and a processor configured to convert the second protocol-related charging request information to the first protocol-related charging request information and transmit the converted first protocol-related charging request information to the first charging module.