The purpose of this study was to analyze the judge's rating in terms of item response theory. The data of the evaluation of standard dance's judge in the final of the 13th Asian Games was analyzed. The FACETS software was used to analyze three-facet Rasch model, testing ”fit statistics” and ”unexpected responses”. The results showed that there were two unfair judges and six ”unexpected responses”. The unexpected responses had been explained by systematic error, misjudging and slipping of pen.