A processing station comprising a holding device for holding a workpiece, a mobile robot for processing the workpiece, and a plurality of partial stations (41 - 48) each of which comprise exactly two docking stations for supplying the mobile robot with electrical energy, wherein the mobile robot comprises: - a carrier vehicle having a plurality of wheels and drives for driving the wheels, - a tool for processing the workpiece, - a robot arm which is arranged on the carrier vehicle and which has a plurality of members (3 - 7) arranged in a sequential manner, a fastening device for fastening the tool and drives for moving the members (3 - 7), - a device for optically detecting the workpiece, which device is arranged to generate an image data set associated with an image of the workpiece, and - a control device which is connected to the drives of the robot arm and to the device for optically detecting the workpiece, the control device being arranged to evaluate the image data set in order to determine the position or the orientation of the mobile robot relative to the workpiece and to control the drives of the robot arm in such a way that the tool carries out the processing in an automatic manner on the basis of a mathematical model of the workpiece, the mathematical model of the workpiece being stored in the control device, and on the basis of the position or the orientation which has been determined, wherein the mobile robot is arranged to approach the individual partial stations (41 - 48) automatically, one after the other, to contact the corresponding two docking stations of the partial station (41 - 48) which has been approached, in order to be supplied with electrical energy in the contacted state via the two docking stations, and to receive the image data set after the contacting, in order to determine the position or the orientation of the mobile robot relative to the workpiece and subsequently to process the workpiece, wherein the two docking stations of each of the partial stations (41 - 48) are arranged in such a way that, when the mobile robot has approached the corresponding partial station, it is located between the two docking stations of the partial station (41 - 48) which has been approached. - a carrier vehicle having a plurality of wheels and drives for driving the wheels, - a tool for processing the workpiece, - a robot arm which is arranged on the carrier vehicle and which has a plurality of members (3 - 7) arranged in a sequential manner, a fastening device for fastening the tool and drives for moving the members (3 - 7), - a device for optically detecting the workpiece, which device is arranged to generate an image data set associated with an image of the workpiece, and - a control device which is connected to the drives of the robot arm and to the device for optically detecting the workpiece, the control device being arranged to evaluate the image data set in order to determine the position or the orientation of the mobile robot relative to the workpiece and to control the drives of the robot arm in such a way that the tool carries out the processing in an automatic manner on the basis of a mathematical model of the workpiece, the mathematical model of the workpiece being stored in the control device, and on the basis of the position or the orientation which has been determined,