A control apparatus for controlling a digital video apparatus using Universal Serial Bus, comprises a storage unit which stores a control program and a control unit which executes the control program. The control program controls (a) step of judging whether a response to a first request for requesting to change a status of the digital video apparatus to a predetermined status is an ACK or not, (b) a step of judging, if the response is the ACK, whether notification information is received or not before a lapse of a predetermined time, the notification information notifying the control apparatus that the status of the digital video apparatus is changed, and (c) a step of transmitting, if the notification information cannot be received before the lapse of the predetermined time, a second request for requesting information representative of the status of the digital video apparatus to the digital video apparatus.