This study aims to verify the quality factor of questions and to explore factor structure based on preliminary questions of ‘Criteria of Special Education Class Evaluation’ developed in the preceding research. To accomplish the goal of this study, I conceived basic questions for development of ‘Criteria of Special Education Class Evaluation' prepared in the preceding research, collected target sampling of special teachers in Chungnam, Chungbuk, Daejeon and Jeonbuk area according to the grade of school, and analyzed the data of 414 copies collected. First, I verified discrimination of questions, multiple collinearity and reliability of questions to examine the quality factor of measuring questions of ‘Criteria of Special Education Class Evaluation’. Second, as the exploratory factor analysis to examine the factor structure of measuring questions of class evaluation criteria, I obtained the verification value of KMO and Bartlett, and verified whether the data would be suitable for the factor analysis, got the factor structure matrix through principal factor analysis and oblimin factor rotation, and analyzed the factors. As a result of study, I organized 6 factors including ‘Understanding of Students and Preparation of Class’, ‘Class Improvement and Generalization’, ‘Individualized Education Support’, ‘Development of Class’, ‘Facilitation of Class Participation’ and ‘Class Support Plan’ and 32 sub questions. Based on this result, I suggested discussion and directions of future studies.