Provided is a computer system including: a plurality of storage systems interconnected via a network, each storage system including a logical volume that stores data; and a management computer that is connected to the storage systems via the network and includes a port connected to the network and a processor connected to the port, wherein: a logical volume of a transfer source in a storage system of the data transfer source and a logical volume of a transfer destination in a storage system of the data transfer destination are decided; it is determined whether it is necessary or not to migrate a license of a program used for the logical volume of the transfer source from one of the plurality of storage systems to the storage system of the transfer destination; and when it is determined necessary to migrate the license, license information regarding the license to the storage system of the transfer destination is migrated. Accordingly, costs of purchasing licenses necessary during data migration or the like are reduced.