In 1997, 100,000 cases exceed the total number of auction case after IMF. And 10 trillion exceed the scale of a market of the real estate auction. In addition, In 2011, 1 quarter, the non-performing loans ratio of the bank is the tendency that 1 trillion of previous quarter contrast increases. the real estate auction is various. There are lots of the variable elements and the peoples undergo many crosses in the auction participation. Therefore, in this research, the conform tries to be presented so that the winning bid decision factor of the real estate auction is investigated and the bidder is able to make the reasonable decision-making which is not subjective decision-making in the complicated real estate auction market. In this research, the winning bid crystal started the assumption that it referred to the independent variable of the preceding researches and it is affected by the internal of the auction and external factor the research with the premise.The time horizon of the research was 11 months in 2010. The spatial range built data with the goods of Seoul eastern district court. By using the logistic regression analysis as the method of study, it analyze empitically. The more the result lowest price of the analysis was low, the more the contract price was high, the more the lowest price to contract price was high, the more the earth scale was small, it was exposed to be influenced by the winning bid crystal as the auction application subject was the person.