An advertisement transmitted from an advertisement distributor terminal and advertisement distribution request information are mutually associated and stored in an advertisement distribution management device. Further, user information transmitted from the user terminal is added with identification information, and stored in the advertisement distribution management device. Thereafter, the advertisement distribution management device acquires user identification information in response to a Web site reading requirement transmitted from the user terminal, and extracts all category information belonged to by advertisements the distribution of which are approved by the user with reference to a user information storing means. Moreover, one piece of category information is determined out of the category information. Furthermore, one advertisement is determined out of the advertisements that belong to the category information, and the advertisement is transmitted to the user terminal.