In this study, based on the analysis of existing definitions of emotional labor, operational definition of teachers' emotional labor is given and questionnaire on emotional labor among primary and secondary school teachers is developed. Research results: exploratory factor analysis shows that teacher's emotional labor involves three dimensions including surface acting, active deep acting and passive deep acting; the questionnaire has good reliability and validity; confirmatory factor analysis shows that emotional labor questionnaire involving three factors is established, which further verifies the validity of scale on emotional labor among primary and secondary school teachers.