A control system for a rotary laser receives control information transmitted by a communications terminal via a first repeater coupled to the communications terminal and transmits the control information to a controller via a second repeater disposed on a rotary laser. The controller regulates an operating state of the rotary laser based on the control information. The control system enables the communication terminal to wirelessly control and operating state of the rotary laser via cooperation between the first repeater and the second repeater so as to achieve a remote control and to avoid use of a dedicated remote control alone, reduce the system costs and be carried easily.