Wireless tag communication device and wireless tag communication method

A wireless tag communication method, comprising:

• acquiring a reading result of a wireless tag that is a target;
• acquiring position information indicating a position;
• storing the reading result obtained by reading the wireless tag in association with the position information;
• and
• estimating a position of the wireless tag when three or more consecutive reading results of the wireless tag at a predetermined interval are obtained.

A hand-held portable wireless tag communication device, comprising:

• a gripable handle;
• a communication device configured to communicate with a wireless tag that is a target;
• a position detection sensor configured to detect information indicating a self position of the wireless tag communication device;
• a memory configured to store the self position, which is specified based on detection information from the position detection sensor, in association with a reading result obtained by the communication device reading the wireless tag;
• and
• a processor configured to estimate a position of the wireless tag when three or more consecutive reading results of the wireless tag at a predetermined interval are obtained, the three or more consecutive reading results of the wireless tag being stored in the memory.