The magnetic stripe mode is to paste the magnetic stripe inside the book. When the reader performs “borrowing”, “returning”, “query / renew” and other operations on the self-service lending and returning machine, when the reader borrows the book, the magnetic stripe of the book will be degaussed by filling the degaussing plate. On the contrary, when the reader returns the book, the magnetic stripe of the book will be degaussed by filling the degaussing plate.In addition, magnetic detectors are set at the entrance and exit of the library to prevent theft.