Provided is a technology that makes it possible for billing and balance management in the form of units that are difficult to understand for a user, to be expressed and managed in the form of units that are easy to understand from the viewpoint of the actual purpose of use. The network connection communication system is provided with means for expressing the unit price of network usage in terms of units that a user can understand more intuitively in the light of the purpose for which the network is used. For instance, the number of connection minutes (time), the number of books purchased and downloaded over the network, or the number of connections to a communicating partner can be used depending on the purpose of use of a service.