A processing device for the assembly of an aircraft encompasses a positioning frame, a guide device and a movable tool arm. The positioning frame can be attached to a segment of a hall floor. The guide device is movably guided on the positioning frame. The movable tool arm is attached to the guide device, and its free end exhibits a tool holder. The processing method for the assembly of aircraft encompasses the steps of providing a positioning frame on a segment of the hall floor, and guiding a guide device on the positioning arm. The guide device here exhibits a movable tool arm, and a free end of the tool arm exhibits a tool holder.