The present disclosure relates to logical unit number (LUN) management methods and apparatuses. One example method includes receiving a management request, where the management request carries an identifier of a first service, determining, from a plurality of logical units (LUNs) in the storage system based on the identifier of the first service, n LUNs corresponding to the first service, and generating a first interface, where the n LUNs corresponding to the first service are displayed on the first interface, and the n LUNs are configured to store data of the first service.