To easily reach the information of an article supply source or advertiser to become an advertisement object on the basis of the display contents of a poster advertisement.

On a paper poster, visible identification information such as a picture code is formed. A user photographs the identification information by a camera packaged in a portable terminal and transmits the analyzed result to a local server by a wireless communication function or the like. On the local server, a database is retrieved on the basis of the identification information and information concerning the paper poster is acquired and returned to the portable terminal. Besides, the portable terminal can directly access the site of the advertiser by an Internet connection through the local server or provider.