To provide an advertisement distribution system using prize information having a high advertisement effect for users, and its method.

The advertisement distribution system using prize information is connected through a communication network 50 with; a user terminal 30 to which advertisement information and game information are outputted; a management server 20 which provides a Web site; and an advertisement distributor terminal 10 which inputs advertisement information and distribution charge information outputted to the user terminal 30 into the management server 20. The management server 20 starts any one processing of advertisement distribution out of game, mail transmission and reception, retrieval processing, and advertisement distribution based on the selection of item information from the user terminal 30, and it is provided with; an advertisement distribution management processing means M15 which outputs a game result to the user terminal 30, and a cash prize management processing means M16 which computes cash prize information and cash dividends information based on conditions set up beforehand after the input of distribution charge information.