To manage articles while utilizing information in ID tags by detecting the read errors of ID tags by comparing a registered weight in the ID tag stuck on the article with the real weight of the article and discriminating whether reading from the ID tag is normally performed or not.
A non-contact IC tag 120 storing the information of an article 110 is stuck on each article 110. A weight measuring instrument 130 for measuring the total weight of articles 110 preserved on a shelf, where the articles 110 are preserved, and a weight output part 140 for outputting the measured value of weight with radio waves (infrared rays, for example,) are attached to that shelf. In the case of stocktaking, a worker collects information in non- contact IC tags 120 while using a reader 150 and collects the information of real weight of articles 110 preserved on the shelf from the weight output part 140. Then, the registered weight is compared with the real weight and it is discriminated whether reading from the non-contact IC tags 120 of all the articles 110 is performed or not.
OTA IZUMI
KAWANO TAKASHI
