According to the present invention, a computer is provided, which comprises a host system, an embedded subsystem, a power source, an input device control module, a first transmission interface and a second transmission interface, the input device control module being connected to the embedded subsystem through the first transmission interface, wherein the input device control module is configured to establish, in response to receipt of a first switching instruction, communication with the embedded subsystem such that the embedded subsystem is enabled to process input data from an input device and to transmit the input data obtained from the input device to the first transmission interface; and the embedded subsystem is configured to receive the input data from the first transmission interface, process the input data and perform an operation corresponding to the input data. According to the present invention, one set of input devices can be shared between a computer and an embedded system through design and modification in software without any change in the existing hardware design for the computer.