According to the present invention, the component selection information sent out from the signal transmitter to the electronic tag attached to the component is collated in the electronic tag with the component identification information recorded in the electronic tag, so that the notifying device notifies the collation result, as a result of which the selected component can be easily recognized by the notification. Additionally, according to the present invention, a write signal is sent out from the signal transmitter to the electronic tag. When the electronic tag receives the write signal, the component identification information is written in the electronic tag. Therefore, it is possible to write the component identification information in the electronic tag in a state in which the electronic tag is attached to the component.