The present invention comprises : a real estate database in which actual transaction prices, geographical coordinates and similar pricing zone data for each real estate are stored in advance; a price estimation design module for applying the model and nonparametric models to an actual price, geographical coordinates, and similar price zone data of the real estate to calculate the price of per model for a given real estate in the population, calculating the weighted price by assigning the same or different weights to the calculated price of each model, while determining the price difference due to different physical locations by checking whether the calculated weighted price is comparable to the similar price range of the real estate, so that the estimated price can be calculated by interpolating the weighted price on the space in consideration of the physical position, when the price difference according to the physical position of the weighted price is equal to or greater than a predetermined reference value; an estimated price validating module for verifying the validity of the estimated price by comparing the estimated price with the actual transaction price; a population price estimating module for calculating an estimated price of the remaining real estate in the population according to the calculation method of the price estimation model design module when the validity is verified; an estimated price adequacy reviewing module which examines the adequacy of the estimated price of the remaining real estate in the population by comparing the price range for the estimated price of the population real estate against the real price range of the transaction price; and an estimated price providing module, which provides the estimated price online, if the estimated price is considered appropriate.(110) Real estate database(120) Price estimation design module(130) Estimated price validating module(140) Population price estimating module(150) Estimated price adequacy reviewing module(160) Estimated price providing moduleCOPYRIGHT KIPO 2017