According to a tendency of a resource allocation request from a customer, a resource configuration that a resource provider provides is changed. The resource allocation request from customer's client machine with respect to a resource that a local domain including a server, a network, and a storage provides is accumulated together with an allocation result, and, on the basis of the accumulated resource allocation information and resource configuration information that the local domain provides, a resource planning algorithm determining the resource configuration to be provided next is executed, and, on the premise that approval of a system manager is obtained via a manager's client machine, the resource configuration change that is a result of the resource planning is applied to a group of resources, and disclosure is made so as to cope with the next resource allocation request by a customer's client machine.