The embodiment of the invention provides an information storage device and method. The device comprises a magnetic track, a write-in unit and a read unit. The magnetic track is composed of multiple magnetic domains and each magnetic domain is divided into at least two magnetic regions. The write-in unit is arranged on the magnetic track and information is written in the at least two magnetic regions of each magnetic domain through the write-in unit. The read unit is arranged on the magnetic track and the information written in the at least two magnetic regions of each magnetic domain is read through the read unit, so that multiple pieces of effective information is written in each magnetic domain of the magnetic track, the storage density of the magnetic track is increased, and the storage capacity of the storage device is improved.