“Reservation with a recorder” is decided by a remote control operation of a TV (101) and an operation target device is decided (102). To the decided operation target device (recorder), key transmission is carried out from the TV (103). When the recorder receiving this key transmission is on standby, a power supply is turned on (104). Next, the recorder makes display request of an electronic program guide to the TV (105). Based on this, in the TV side, input switching is performed to HDMI of which display request is made from the recorder side (106). Meanwhile, in the recorder, a program guide display operation is performed (107). Various key operations (108) performed for the TV is sent to the recorder side (109), and in the recorder, various operations in the recorder side are performed (110) in response to the various key operations. Based on the electronic program guide which is displayed, recording reservation of a desired program can be made from the TV side. When the processing of the recorder side is completed (111), a notice of completion/input switching request is provided (112) to the TV from the recorder. The TV which receives this performs input switching to return to its original state (113), and the power supply is turned off in the recorder side (114).