Even if software resources for a physical server are changed, log information about the physical server can be accurately matched against the software resources.
If the need arises to migrate business applications in a physical server (migration source), from among a plurality of physical servers, to another physical server (migration destination), a management server collects log information, which has been collected by the migration source physical server, from the migration source physical server, collects identifiers for identifying the business applications at the migration source, and records the collected identifiers in the collected log information. Subsequently, when the business applications are migrated to the migration destination physical server, the management server records the identifiers for identifying the business applications in log information about the migration destination physical server.