To enable a user to quickly provide a branch bank over the Internet, by enabling a customer to move between a screen on which services of the branch bank are provided and a screen on which services provided by a nonbank company on the Internet are provided, without the customer having to confirm personal information.

This system is constructed in an information processing system 1 for a bank that can be connected in communication with a plurality of terminal devices, can be connected independently and directly to a customer via the Internet and provides each of a plurality of services of the bank , each of a plurality of services of an associated nonbank company and also a new service due to fusion of services, combination and partial change owning to cooperation with the nonbank company by providing an intimate connection environment among information processing systems 2 to 4, which utilize the business resources of the associated nonbank company.