To provide a system capable of acquiring the latest data of an object fitted with a plurality of radio tags even if only part thereof can be read.

In case only the data Dn-1 of a radio tag 110a was read, a control device 12B for a check point 10B acquires the latest data (here, Dn-1) of the applicable object 100 is acquired from a management server 20 using the tag ID in the data Dn-1, performs processing for passing the check point 10B using the data Dn-1, writes the data Dn produced by this processing into a radio tag 110a, and registers into the management server 20. In case only the data Dm of an older radio tag 110b than the latest data Dn can be read, the control device 12C for the next check point 10C performs processing by acquiring the latest data Dn from the management server using the tag ID in the data Dm, writes the data Dn+1 produced by the processing into the radio tag 110b, and registers into the management server 20.