To instantly obtain detailed advertisement information on a company, an article, etc., that a user desires.

The user photographs a two-dimensional code 7 drawn on an outdoor signboard 6 installed outdoor with his or her mobile terminal 1, and distribution server identification information is extracted by decoding characters and numbers from image information of the photographed two-dimensional code 7 to transmits a message requesting advertisement information to a distribution server 2 specified with the extracted distribution server identification information, thereby displaying advertisement information received from the distribution server 2.