This thesis attempts to offer an interpretation of Qunshu Zhiyao (羣書治要), especially focusing on the quotations from the historiographic part. The chief editor of Qunshu Zhiyao (hereafter Zhiyao) is Wei Zheng 魏徵, the well-known historian and politician highly trusted by Emperor Taizong 唐太宗in Tang Dynasty. As a collection of well-chosen matters about governance, Zhiyao reflects not only the political thinking of the governing class, but also their conception of history during the period of Zhen Guan. When Emperor Taizong and Wei Zheng discussed about politics, they emphasized on the cause of the rise and fall of each dynasty. By doing so, they obtained numerous lessons from history. That was the pragmatism of historiography, which formed the main ideology in Zhen Guan Period and was what Zhiyao depends on. My analysis in this thesis begins with the introduction of the whole Zhiyao and then focuses on the historiographic part of the work. This thesis consists of three parts. In the first part, I examine the political background which gave birth to the blossom of the study of historiography in Zhen Guan period. In the second part, I argue that the academic orientation of Zhiyao belongs to the Emperor Learning which was based on the study of history. In the last part, the historiographic part of Zhiyao will be the main focus. Only from the close reexamination of Zhiyao will we know that the editors transcribed the historical sources mainly from the pragmatic trajectory. That trajectory can be divided into these four aspects: (1) moral teachings, (2) positive models, (3) practical skills of governance, and (4) justice and mercy perceived in the study of monarch-subject relationship. It is from the study of Zhiyao that we know how those four aspects are especially extracted from the historical records and are deeply valued by the editors.