In the field of Critical Interpretation of Ancient Texts, the two Wangs from Gaoyou, Wang Nian-sun, and Wang Yin-zhi are distinguished for their achievements, whose Guang Ya Shu Zhen, Du Shu Za Zhi, Jing Chuan Shi Ci, and Jing Yi Shu Wen have been renowned and constantly praised in the academics. It speaks for itself that these books have been widely probed and cited by many scholars. In addition to this, as the most important work, Wang Nian-sun's Shi Da has been studied for tongyuan ci in the book. Its compiling and other related questions, however, have been neglected. This paper takes Shi Da as research object, aiming at clarifying the important questions related to this book by studying its edition, compilation, compiling style and otes on the vocabularies, and the author's ideas of writing this book.