To prevent deterioration or disconnections of a cable due to heat and to downsize the system by providing a plurality of movable luminaires and a means for transmitting and receiving a signal between a console for controlling it and a relay control portion of an inputted control signal.

A device for transmitting and receiving a signal with infrared light is preferably provided. A moving speed signal or a position moving signal of a movable luminaire 3, which are inputted by a console 1 is fed into a relay control portion 2, decoded by a communication control circuit 2-1, then transmitted from an infrared light transmitting portion 2-2 to infrared light transmitting/ receiving portion 3P1, 3T1, 3F1 of respective drive devices 3P, 3T, 3F of the movable luminaire 3, and fed into respective MPU 3P2, 3T2, 3F2. Detected values of a speed censors 3P4, 3T4, 3F4 are sampled at every definite time interval, a command is sent so that deviation is zero, and motors 3P5, 3T5, 3F5 are driven to arbitrarily move the movable luminaire 3.