To provide a roll management system capable of tracking information indicating roll diameter of a roll used in a rolling mill without loading a large burden on a worker.

The roll management system 1 has a system configuration in which an external storage device 20 formed by combining a plurality of high-capacity hard disks, a ZM programmable controller 21, a plurality of PCs 22, a carriage control board 23, a peripheral control board 24, a plurality of radio HTs 19 and respective load sensors 16a-16e, etc. are connected to a management server 27 via a plurality of HUB devices 25 or a radio AP 26 by wire communications or radio communications. The management server 27 manages positional information on a work roll, in association with a tag ID indicating the roll diameter of the work roll.