PROBLEM TO BE SOLVED : To provide a system capable of calculating a proper assessed price without imposing much costs or labors at the time of comparing and considering real estates.SOLUTION : This system is provided with a case property information recording means for recording the evaluation item information and evaluation price of a case property similar to an assessment property, an assessment property information recording means for recording the evaluation item information of the assessment property, a correction coefficient group calculating means for calculating a correction coefficient group based on the level of similarity between the evaluation item information of the example property recorded by the example property information recording means and the evaluation item information of the assessment property recorded by the assessment property information recording means, and an evaluation price calculating means for calculating the evaluation price of the assessment property from the evaluation price of example property by applying the correction coefficient group to a preliminarily set correction arithmetic formula.