A method is adopted in a control apparatus for controlling ID information stored in a storage medium in conjunction with a terminal for reading the ID information from the storage medium and used to catalog information for the storage medium into a memory employed in the control apparatus. In an operation to catalog information into the memory of the control apparatus, the terminal receives the information, reads the ID information from the storage medium and transmits the information and the ID information to the control apparatus and the control apparatus catalogs the information and the ID information in the memory by associating the information with the ID information. In an operation to examine information already cataloged in the memory employed in the control apparatus, the terminal reads the ID information from the storage medium and transmits the ID information to the control apparatus; and the control apparatus transmits the information already cataloged in the memory and associated with the ID information to the terminal for displaying the information.