This books is to identify and characterize the principle of succession in Silla. It is composed of Six chapters, In chapter 2 the new royal lineage was restored reviewing each family record. Based on this, chapter 3 is about each type of succession to the thorne of Silla . Chapter 4 is about the relationship among the senior office-head of the Council of nobles, Sangdaedeung(上大等), lord chancellor, Sijung(侍中), Minister of the board of Military affairs. Pyeongbryong(兵部令) and so on. The treason of usurping of the thorne Is mentioned in chapter 5. Chapter 6 is about extinction of Kolpum chedo(骨品制度) and the first King who was not person of party royal lineage, Chin-gol(眞骨). Last in chapter 7, recognized re-establishment of succession to the thorne of Silla through 'Hunyo 10jo' stated by Taejo in Koryo.