PURPOSE : An online real estate auction system is provided to supply more beneficiaries based on a quicker auction participation order, thereby enabling users to normally participate in an auction at a proper time. CONSTITUTION : An auction object registration unit(21) inputs information about a specific real estate by a licensed real estate agent(13-1). An auction object posting unit(22) processes information for an auction target real estate and a corresponding licensed real estate agent. An auction progressing unit(23) performs an auction process during an auction participation period. The auction progressing unit selects a successful bidder. A compensation processing unit(24) differently pays compensation money to an unsuccessful bidder based on a participation order.