The Interest measurement theory put forward by the Japanese scholar Ichiro Kato has its positive significance. It reveals that the process in which a judge decides cases by applying the law is a process of interest measurement. However, this theory has its shortcomings, the most basic one being the lack of a system of scientific rules, which can easily lead to arbitrariness. Interest has a stratified structure: the specific interests of parties, group interest, institutional interest, social interest and pu...