To issue a lottery ticket and to convert it into money through a wide area computer network.

When a sales agency outputs an information input image (S2) to the ticket issuing terminal of a purchaser in response to the lottery purchaser request and the purchaser inputs the number of lotteries to be bought and a means to purchase them, database processing and settlement processing (S9) are performed in accordance with it, and the ticket issuing terminal performs a ticket issuing output (S12) at an external storage medium in a wide area computer network. A management number is made by a random number that has no relation to a lottery number for preventing forgeries and is recorded on the external storage device and the database.