PROBLEM TO BE SOLVED : To verify and adjust a primary evaluation result.SOLUTION : A base price evaluated by a real estate appraiser or the like to be used as an evaluation criterion is stored as a database in a base price database 10. A difference rate predetermined to each price determination factor in accordance with its content is stored in a price determination factor table 12. An evaluation device 14 refers to information of the base price database 10 and the price determination factor table 12, it calculates an evaluation score and an appraisal value of an evaluation object land, and it stores them in a database 16. A copy 18 is made of the database 16, a verification device 22 executes continuous street verification, verification within similar situation areas, and boundary verification to the copy 18, and evaluation data of the copy 18 is adjusted by an adjusting device 24 at each verification step. A factor comparing device 30 displays evaluation points along with price determination factors to a plurality of designated streets so as to compare them in a display device 26 during verification.