In order to manage a group of sheets to be distinguished from other sheets, a sheet management device is configured to: generate first block data that includes identification information of a plurality of sheets handled by a first sheet handling apparatus and a first eigenvalue calculated based on first input values including the identification information; generate second block data that includes identification information obtained by handling the plurality of sheets by a second sheet handling apparatus and a second eigenvalue calculated based on second input values including the first eigenvalue and the identification information obtained by the second sheet handling apparatus; and manage the second block data in association with the first block data.