Product display rack system and purchasing behavior analysis program

A purchase behavior analysis program analyzing customers' purchase behavior for products displayed on product display shelves using RFID tags for use in a product displaying system comprising:

• a plurality of product display shelves on which a plurality of kinds of products each applied with RFID tags storing uniquely given tag serial numbers are displayed;
• a plurality of antennas disposed on said product display shelves, each having unique antenna numbers and detecting a tag serial number from an RFID tag on a product within a predetermined area;
• human body sensors disposed on different positions on the front side of said product display shelves and detecting a human body approaching thereto;
• a control computer having a tag-product ID registration table storing the tag serial numbers of said RFID tags and the product IDs of the products uniquely given to the products, each tag serial number corresponding to each product ID, the control computer being inputted a tag serial number of an RFID tag detected by said antennas and a detection time of said human body sensors;
• and
• a display device, wherein
• said control computer implements a function of detecting that a particular product is picked up from and/or returned to a particular product display shelf by combining the tag serial number of the RFID tag and the antenna number of the antenna detecting the tag serial number and a function of judging which direction the detected human body moved in based on the difference of the detection times of said human body sensors.