This study focuses on the Tiantai teaching system within the context of Chinese Buddhism, specifically examining the Five Periods and Eight Teachings and the Teaching on the Guidelines. The Master's book, "The Key to the Mind of Tiantai," provides an interpretation of this instructional system, accompanied by supplementary annotations to help students grasp its essence. By analyzing the literal transcripts of the Master's teachings, this research aims to identify the unique emphases and values emphasized during the teaching sessions, distinguishing them from the content presented in written works. This sheds light on the Master's innovative approach to Tiantai teaching. The study further aims to establish a systematic understanding of Buddhist teaching by organizing and structuring the Five Periods and Eight Teachings, encompassing elements such as teaching appropriately to the spiritual capacities of the listener , teaching of the scriptures , understanding principles, cultivating perspectives, attaining wisdom, eliminating delusions, and The fruits or rewards of the various stages of attainment. It also explores the integration of the Six Stages and the Ten Practices, presenting a clear and comprehensive system for studying and practicing Buddhism.