A host electronic device, comprising: a main operating circuit, having a processor; a first peripheral bus, arranged to be connected to the main operating circuit; an interface circuit, arranged to be coupled to a host computer, and receive an external command from the host computer by a transmission protocol compatible with a first interface; a second peripheral bus, arranged to be connected to the interface circuit; a conversion device, arranged to be coupled between the first peripheral bus and the second peripheral bus, an external adapter, arranged to be connected to the second peripheral bus, and encode the external command to produce a first network packet; an internal adapter, arranged to be connected to the first peripheral bus, and receive the first network packet; and a network channel, arranged to be coupled between the external adapter and the internal adapter, and transmit the first network packet from the external adapter to the internal adapter, wherein the internal adapter is further arranged to decode the first network packet received from the network channel to produce a decoded external command, and the processor is arranged to execute the decoded external command for enabling the main operating circuit to execute a corresponding operation, the host electronic device being characterized in that the conversion device is further arranged for producing a hardware information and transmitting the hardware information to the host computer for enabling the host computer to identify the host electronic device as a peripheral device when the interface circuit is coupled to a third peripheral bus of the host computer. a main operating circuit, having a processor; a first peripheral bus, arranged to be connected to the main operating circuit; an interface circuit, arranged to be coupled to a host computer, and receive an external command from the host computer by a transmission protocol compatible with a first interface; a second peripheral bus, arranged to be connected to the interface circuit; a conversion device, arranged to be coupled between the first peripheral bus and the second peripheral bus, an external adapter, arranged to be connected to the second peripheral bus, and encode the external command to produce a first network packet; an internal adapter, arranged to be connected to the first peripheral bus, and receive the first network packet; and a network channel, arranged to be coupled between the external adapter and the internal adapter, and transmit the first network packet from the external adapter to the internal adapter, wherein the internal adapter is further arranged to decode the first network packet received from the network channel to produce a decoded external command, and the processor is arranged to execute the decoded external command for enabling the main operating circuit to execute a corresponding operation, the host electronic device being characterized in that the conversion device is further arranged for producing a hardware information and transmitting the hardware information to the host computer for enabling the host computer to identify the host electronic device as a peripheral device when the interface circuit is coupled to a third peripheral bus of the host computer.