This invention provides a real estate investment system that enables a loan agreement and establishment of a mortgage on each investor' s equity to the total value of an investment. The real estate investment system comprises a server S of an investment management institution and investors' terminals T connectable to the server of the investment management institution through the Internet. The server S of the investment management institution includes a real estate information display part 1 for displaying information related to specific real properties, an investment information display part 2 for displaying investment information used when the investors make investments in mortgaged properties, and a member personal information display part for displaying personal information on registered members. The investment information includes the number of units offered and a rate of dividend per unit so that each investor will make a real estate investment based on the real estate information display part 1 and the investment information display part 2 of the server of the investment management institution.