PROBLEM TO BE SOLVED : To provide an advertisement delivery method capable of providing information on a desired thing to a customer when an excellent thing occurs without wasting paper.SOLUTION : An advertiser designates the delivery date for delivering an advertising mail 16 as an electronic mail for advertising a real estate and the layout position of an advertisement in the advertising mail 16, and inputs advertising information, and the information is received and stored by a management computer 11. The management computer 11 generates the advertising mail 16 for advertising the real estate on the delivery date, transmits the same to a customer terminal 13, and stores information for providing the corresponding detailed information 17 as a Web page in a Web display information storing part 76. URL 25 in the advertising mail 16 shows an address for storing the information for displaying the concerned detailed information 17 in the Web display information storing part 76, and when the URL is designated, the detailed information 17 is displayed on the display part of the customer terminal 13.