To provide a method of connecting to the Internet allowing a user to surely gain an access to the page of a sponsor.

The server 14 of a service provider comprises a public line side communication processing part 30 for controlling the communication between a public line and terminals, a user specifying part 32 for authenticating a user by using an ID and a password started at the terminals, a user access processing part 38 for preparing a contents transmission request according to commands from the terminals, an Internet communication processing part 44 connected to the Internet, transmitting the contents transmission request to a specific contents server, and receiving the transmitted contents, and a sponsor administration part 42 acquiring advertisement contents by selecting a specific advertisement after authentication. The acquired advertisement contents are transmitted to the terminals through the public line, and when the terminals are connected to the Internet, the advertisement contents are initially displayed.