When a user or a portable device enters work space, the user or the portable device entering the work space is detected by reading of an ID tag, and a connection interface public server for managing connection interfaces of computational resources which these user and portable device have and a coordination server for performing coupling processing are notified. The coordination server acquires the connection interfaces corresponding to the computational resources of the entering user or the portable device from the public server and couples these and thereby, it is constructed so that linkage between the computational resources shareable in the work space can be performed to make use.