To provide a wireless IC tag technology for effectively establishing a method of checking normality when a cable terminal is separated from or connected to terminals which are arranged in high density on a terminal board.

Configuration is made by a first wireless IC tag provided with a female type handshake chip 2601 having a first terminal 2607 and a second terminal 2608, a second wireless IC tag provided with a male type handshake chip 2605 having a third terminal 2609 and a fourth terminal 2610, and so on. A first recognition number is stored in the female type handshake chip 2601, and a second recognition number is stored in the male type handshake chip 2605. When the first terminal 2607 and the second terminal 2608 are not connected with the third terminal 2609 and the fourth terminal 2610, the first recognition number and the second recognition number are each independently read out by wireless, while the first recognition number and the second recognition number are continuously read out by wireless when they are connected.