Comprising: an IC tag 120 that is attached to a work in process 100 of a portable telephone 110 and memorizes information related to a production condition of the portable telephone 110; a mounting device 140 that reads out the information related to the production condition of the portable telephone 110 from the IC tag 120 and mounts components of the portable telephone 110, based on the readout information related to the production condition of the portable telephone 110, on the work in process 100 with the IC tag 120 attached; an inspection device 150 that reads out the information related to the production condition of the portable telephone 110 from the IC tag 120, and inspects the work in process 100, which the IC tag 120 is attached and the components of the portable telephone 110 are mounted, based on the readout information related to the production condition of the portable telephone 110; and an editing device 130 that writes the information related to production of the portable telephone 110 into the IC tag 120.
