By studying the simulated process of teacher-to-teacher assessment, the article elaborates on the scientificity and objectiveness of the application of AHP in assessing teachers’ comprehensive working performance. Through computer programming, AHP is put into practice in the field of scientifically assessing teachers’ working performance. Furthermore, it argues for the application of database in managing and assessing data as well as computer software in evaluating and calculating. This software also is applicable to other kinds of multiple-objective decision-making and assessing.