An operating method of a terminal device, comprising: pairing with a video display apparatus by executing an interworking application; determining whether the video display device supports automatic content recognition, ACR; acquiring a part of an audio-visual content regenerated by the video display apparatus, when the video display device does not support ACR; acquiring an address of an enhanced service and a start time of the enhanced service based on the captured part of the audio-visual content; acquiring the enhanced service, from an enhanced service providing server (50, 500), based on the address of an enhanced service; transferring the enhanced service to the video display apparatus, wherein the enhanced service includes control function which represents providing user interface for controlling the enhanced service by a user, and display function which represents displaying the enhanced service via a display unit; transmitting a first request message for requesting the control function transfer of the enhanced service from the video display device to the terminal device; receiving a first response message including the control function of the enhanced service, type information of the enhanced service, and capability information of the terminal device, wherein the response message is generated by the video display device based on the first request message; transmitting a second request message for requesting conflict event registration, wherein the conflict event occurs when the maximum number of terminal devices to which the control function of an enhanced service executed in the video display device is transferred is smaller than the number of terminal devices requiring the transferring of the control function of the enhanced service; receiving a message for notifying the conflict event occurrence from the video display apparatus, when the another terminal device requests control function for the enhanced service, and the conflict event occurs; and transmitting a third request message for releasing control function transfer and transferring the control function to the another terminal device, when an input for terminating the enhanced service is received, wherein second request message includes a first element containing a session value that the video display device issues to the terminal device, name element and second element containing an identifier of the enhanced service corresponding to the second request message. pairing with a video display apparatus by executing an interworking application; determining whether the video display device supports automatic content recognition, ACR; acquiring a part of an audio-visual content regenerated by the video display apparatus, when the video display device does not support ACR; acquiring an address of an enhanced service and a start time of the enhanced service based on the captured part of the audio-visual content; acquiring the enhanced service, from an enhanced service providing server (50, 500), based on the address of an enhanced service; transferring the enhanced service to the video display apparatus, wherein the enhanced service includes control function which represents providing user interface for controlling the enhanced service by a user, and display function which represents displaying the enhanced service via a display unit; transmitting a first request message for requesting the control function transfer of the enhanced service from the video display device to the terminal device; receiving a first response message including the control function of the enhanced service, type information of the enhanced service, and capability information of the terminal device, wherein the response message is generated by the video display device based on the first request message; transmitting a second request message for requesting conflict event registration, wherein the conflict event occurs when the maximum number of terminal devices to which the control function of an enhanced service executed in the video display device is transferred is smaller than the number of terminal devices requiring the transferring of the control function of the enhanced service; receiving a message for notifying the conflict event occurrence from the video display apparatus, when the another terminal device requests control function for the enhanced service, and the conflict event occurs; and transmitting a third request message for releasing control function transfer and transferring the control function to the another terminal device, when an input for terminating the enhanced service is received, wherein second request message includes a first element containing a session value that the video display device issues to the terminal device, name element and second element containing an identifier of the enhanced service corresponding to the second request message.