To provide a shelf inventory control method and a system capable of surely providing information on a control object member by radiocommunication by an RFID tag with a simple and inexpensive constitution.

A shelf 1 is divided into a plurality of stages by a plurality of shelf boards 2, and the control object member 3 attached with the RFID tag 4 is placed in the respective stages. The information is read from and written in the RFID tag 4 of the management object member by rotatably moving by mounting a control part 7 on a carriage 8 together with integrally formed antenna 6 and reader-writer 5, for example, along a predetermined track around this shelf 1.