Provision of an organization definition information storing unit for storing organization definition information, a contents storing unit for storing contents provided for users, a customizing information storing unit for storing in set, as customizing information, a customizing condition set by the use of arbitrary organization definition information, and information for indicating contents to be provided as utilization environment in a case where the customizing condition is established, and a personal environment constructing means for acquiring the customizing information from the customizing information storing unit, for judging whether or not the customizing condition is established with regard to each user by utilizing the organization definition information stored in the organization definition information storing unit, and for acquiring the contents stored in set together with the customizing condition from the contents storing unit in a case where the customizing condition is established, thereby adding the acquired contents to the personal environment of the user.