A method for configuring connection of AV cables between peripheral devices and a video device, wherein the peripheral devices are further connected to the video device over communication control lines, comprising: the video device sensing the peripheral devices connected over the communication control lines and allocating a unique identifier to each of the respective peripheral devices; the video device sending a command to request the back panel information to the peripheral devices each having the given unique identifier, over the communication control lines; the peripheral devices each checking their own back panel information and sending their respective back panel information to the video device over the communication control lines, in response to receiving said request for back panel information; the video device computing an optimal connection configuration by referring to the back panel information of the respective peripheral devices so that the user can view and listen to the best quality video and audio possible; the video device checking a current AV connection situation for each peripheral device by: powering off all of the peripheral devices except for the video device; determining whether a signal is input to a particular input terminal of the video device 100); if it is determined that the signal is not input, powering on a peripheral device of which the connection status is to be recognized and checking whether the signal is input to the particular input terminal of the video device; and if it is checked that the signal is input, identifying a particular input terminal of the video device to which the signal is input from the powered peripheral device; the video device checking whether the current AV connection situation corresponds to the optimal video and audio connection configuration; and, if the current AV connection situation is not the optimal video and audio connection configuration, the video device displaying a connection configuration error screen with the optimal video and audio connection configuration suggested on the screen. the video device sensing the peripheral devices connected over the communication control lines and allocating a unique identifier to each of the respective peripheral devices; the video device sending a command to request the back panel information to the peripheral devices each having the given unique identifier, over the communication control lines; the peripheral devices each checking their own back panel information and sending their respective back panel information to the video device over the communication control lines, in response to receiving said request for back panel information; the video device computing an optimal connection configuration by referring to the back panel information of the respective peripheral devices so that the user can view and listen to the best quality video and audio possible; the video device checking a current AV connection situation for each peripheral device by: powering off all of the peripheral devices except for the video device; determining whether a signal is input to a particular input terminal of the video device 100); if it is determined that the signal is not input, powering on a peripheral device of which the connection status is to be recognized and checking whether the signal is input to the particular input terminal of the video device; and if it is checked that the signal is input, identifying a particular input terminal of the video device to which the signal is input from the powered peripheral device; powering off all of the peripheral devices except for the video device; determining whether a signal is input to a particular input terminal of the video device 100); if it is determined that the signal is not input, powering on a peripheral device of which the connection status is to be recognized and checking whether the signal is input to the particular input terminal of the video device; and if it is checked that the signal is input, identifying a particular input terminal of the video device to which the signal is input from the powered peripheral device; the video device checking whether the current AV connection situation corresponds to the optimal video and audio connection configuration; and, if the current AV connection situation is not the optimal video and audio connection configuration, the video device displaying a connection configuration error screen with the optimal video and audio connection configuration suggested on the screen.