In this paper, we propose a quality control system to improve the effect of Flipped Learning Class. The proposed quality control system is conducted during a semester from a stage before a lecture to a stage after lecture. To emphasize self directed learning, Flipped Learning, which studies various application learning after prerequisite learning of students, is widely used not only in higher education such as a university but also various educational fields. In order to efficiently run a Flipped Learning lecture, it is necessary to redesign the lecture. This is consists of a PreClass which is studied prerequisite learning of students, and a InClass which can deepen the contents of a PreClass through interaction between the instruction and students in the lecture room. In addition, the lecture is improved through the monitoring and the consulting about a InClass. After the lecture is run, reflection on the operation of the class should be done. The proposed Flipped Learning quality control system is designed to include the course redesign, lecture management improvement, and self - reflection process. The analysis of the Flipped Learning operation shows the superiority of the proposed quality control system.