Disclosed is a portable terminal that includes an external device interface unit, a memory unit, a main controller, and a power supply unit. The external device interface unit provides a connection between the portable terminal and an external device, includes ports outputting control signals and electric power for operating the external device, and controls an operation of the external device. The memory unit stores downloaded information for operating the external device that is connected to the portable terminal through the external device interface unit. The main controller generates an external device control signal based on the operation information stored in the memory unit, and transmits the external device control signal to the external device interface unit. The power supply unit provides power for driving the external device through the external device interface unit.