This research focuses on the examination of problems related to the national teacher performance appraisal system by the Thai Ministry of Education. It highlights major problems of the current performance appraisal system by delineating the weaknesses and pitfalls of the current appraisal system. The findings indicate problems to three major types; problems from the mismanagement of the system; problems arising from the evaluators; and problems arising from the applicants. These problems are the major constraints in accelerating education devolution and development. Therefore, Thailand's Ministry of Education should find the way to improve its method of teacher performance appraisal.