The present invention accepts attribute information of evaluation subject parts, and judgment standards of parts category by a data acquiring unit; acquires attribute information and chemical substance information relating to a part already inspected; categorizes the relevant attribute information and the relevant chemical substance information to a part group having attribute information of the evaluation subject parts, and a part group not having it; carries out calculation of statistic values of the content rate of a specified chemical substance in each of the parts groups, comparison between difference of said statistic values in each of the parts groups and the relevant judgment standards, and extraction of said attribute information; extracts attribute information and chemical substance information of said parts already inspected, coincident with all of attribute information extracted; and calculates the statistic value such as an average value relating to the content rate of the chemical substance of these parts.