A computer system formerly handles a service that is quickly reproduced with another computer system to resume the service immediately. The association relations between services run by a primary site (1) and primary site servers (13), between the primary site servers (13) and a primary site storage system (15), and between the storage system (15) of the primary site (1) and a storage system (25) of a secondary site (2) are collected. The collected association relations are copied as configuration information from the storage system (15) of the primary site (1) to the secondary site (2). On the secondary site (2), based on the copied configuration information, services of the primary site (1) are assigned to servers (23) of the secondary site (2), and the secondary site servers (23) are associated with the storage system (25) of the secondary site (2) to reproduce the primary site (1) thereon.