The study conducted focused interviews with teachers and parents to examine the status of the self-evaluation system in school from the perspective of school-based management. To summarize the results of the study, first, the autonomy of the school was insufficient and self-evaluation was operated in a perfunctory manner. Second, the actual participation of parents and students was being restricted. Third, teachers tried to evaluate the school in a positive way, and they treated the students not as the evaluators but just as students in the context of school evaluation. Parents took a passive position in evaluation. As a result, securing internal responsibility was not kept. Fourth, self-evaluation was not properly learned within the teachers and parents groups due to unilateral communication centered on teachers and in the form of encouraging agreement”. Fifth, due to lack of expertise related to school evaluation by teachers and parents and the absence of a practical feedback system, the self-evaluation failed to lead to the expansion of the capabilities of school and its members. Based on these findings, the “path dependency” surrounding the school s self-evaluation, the tendency to maintain boundaries of teachers, the passive attitude of parents, and decoupling emphasized in neo-institutionalism were discussed, and suggestions for better practices were presented.