A classification of doctrine(敎判) is to classify the teachings according to theme, time period, etc. This classification of doctrines was usually done by scriptural commentators who, while seeking a way to accommodate the diversity of the Buddhist teachings into a single system, usually tended to valorize the teachings of their own school. In addition, Teaching taxonomy was a major aspect of the textual studies of many 5?8th century monks from the scholarly schools of Chinese Buddhism, such as Tiantai(天台) and Huayan(華嚴). It is thought that this practice originated in China during the period of the northern and southern courts(南北朝, 420?589), from the time of Sengrui(僧叡). In the classification of doctrine during the period of the southern courts, due to the necessity of comprehensive understanding of Buddhist scriptures and their doctrines, its first goal was to arrange and analyze them. The attitude of selecting and following a specific scripture appeared much later against our expectation, while the scholars in the early parts of the period of the southern courts were rather interested in understanding and accommodating the doctrinal contents of various Buddhist scriptures. There was no sectarian perspective on Buddhism at that time, such a perspective, combined with the classification of doctrines, appearing since the establishment of Sui and Tang dynasties.