To provide a control unit for a working robot, capable of always exactly detecting the position of a workpiece.

Working facilities E comprise a carrying device 2 for carrying a workpiece, and the working robot 1 for carrying out the work for the workpiece carried by the carrying device 2. The carrying device 2 comprises a rail 29 for defining a carrying route, a plurality of trolleys 22 which are set for every workpiece and run on the rail 29, connecting bars 23 for connecting the trolleys 22, carrying stands 24 which are fixed on the trolleys 22 or the connecting bars 23 and can mount the workpiece thereon in the positioned sate, and a sensor 3 for detecting the movement S of at least the trolleys 22 and the connecting bars 23. The working robot 1 is configured so as to carry out the work for the workpiece by being controlled based on the movement S of the trolleys 22 and the connecting bars 23 detected by the sensor 3.