We study 295 students in order to edit inventory of students' satisfactory level for elective interested grouping for physical education in Minghsin Institute of technology. After discussion of relative references, we use ”item analysis” to choose suitable 45 questions from pre-test questions.By means of ”factor analysis”, we construct validity and divide into 6 factors: students' potential and effective learning, professional facility, teaching facility and equipment, teaching affair administration, peer interaction, physical regulations. Finally, we construct reliability by ”reliability analysis” to form this formal inventory.