The present invention relates to a real right lottery system and purchasing method thereof on the internet, more specifically to a real right lottery system and purchasing method thereof on the internet in which who wants to sell his or her real estate or estate applies to website according to the present invention. Total value of the subject matter is divided into small amount of value for issuing lottery. A number of netizens purchase the lotteries and winner earns the subject matter. The present invention enables sellers to sell subject matter easily.