Abstract: A remote service offering system is provided, which includes a plant having a plant server and a plant controller, an end user terminal, and a center having a center database and a center server, the plant, the end user terminal and the center being connected to one another through a wide-area network. When the center server receives a request for display of accumulated information from the end user terminal, it obtains accumulated information held by the plant server and provides the accumulated information to the end user terminal. When the center server receives a request for display of real-time information from the end user terminal, it obtains real-time information collected by the plant controller and provides the real-time information to the end user terminal.