The core of this study centers on Ruan-Ji's ”Essay on Comprehension of Yi”, explores its essence, and proposes a critical review on the philosopher's intellectual achievement. The comparison of different points of views on this work shall equip us a profound comprehension towards Ruan-Ji's genuine thoughts, and also amend certain errors that had been misinterpreted and adapted by historians. This research begins with a condense summary of contributions from influential scholars, and so it illustrates how this said work had been positioned and approached. It then proceeds to determine and clarify the development in different schools of thoughts responding to this said work, and proposes the author's personal insights on the essence of Chou-Yi, and comments how virtues, artificial institutions, discourses between the emperor and courtiers, as well as historical perspectives were affected by this philosophical stream, and how most likely this is to develop in the upcoming dacades. This research illustrates Ruan-Ji's philosophical treasures with a concrete reference to the interpretations on Yi Ching, so as to bring a just critical review on the value of the said work.