CONTROL SYSTEM, RELAY DEVICE AND CONTROL METHOD

A control system according to the present invention is mounted on a moving object. The control system includes: an observing device which transmits observation result data indicating an observation result of surroundings of the moving object; a first control instruction device which transmits first control data indicating the control contents determined based on the observation result data; a movement control device which controls movement of the moving object; and a relay device which relays the first control data transmitted from the first control instruction device , to the movement control device . When a second control instruction device which transmits second control data indicating the control contents determined based on the observation result data is provided to the control system , the relay device transmits the second control data instead of the first control data, to the movement control device