PURPOSE: A method for jointly investing/distributing lottery tickets and an online system thereof are provided to reduce an investment risk for the lottery tickets and maximize a winning probability by applying project finance of a joint investment character based on discriminated profit distribution and realizing distributed investments with the same investment. CONSTITUTION: A customer terminal(101) is connected to a joint lottery ticket investment/distribution site. A settlement/purchase system(104) enables a customer to settle price for investing in the selection typed lottery ticket. An investment server(105) including a web server and a mail server operates/manages member information. A database(106) stores member and investment information of the investment server. A communication network(103) connects the customer terminal, the investment server, the settlement/purchase system, and the database. A control unit(102) comprises program for controlling all information needed for lottery ticket purchase/investment as a proxy, opened investment, encryption, and operation.
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