A camera (16) and a rotary base receiver (28) are connected to each other to be capable of transmitting a video signal. In the camera (16), a web server (50) sends out a video signal to the outside and receives a camera remote control signal and a rotary base remote control signal from the outside. A control unit (40) controls the camera (16) according to the camera remote control signal. The rotary base remote control signal is superimposed on a video signal to be transmitted to the rotary base receiver (28) by a video signal circuit (52). The rotary base receiver (28) extracts the rotary base remote control signal from the video signal, and controls a rotary base (14) according to the rotary base remote control signal. The configuration for a superimposed transmission can be utilized and both the camera and the rotary base can be controlled with ease through communications with the outside.