"The Book of Changes" is known as "the first of the classics and the source of the great truth". It is a must-read cultural classic and wisdom classic in traditional Chinese society. This book extensively searches and carefully interprets relevant literature and materials, fully absorbs and draws on previous research results and methods in the academic world, and on this basis briefly comments on the structural form and spread process, core ideas and contemporary value of "The Book of Changes". It systematically examines the internal connection between the "Book of Changes" and the theories of hundreds of schools of thought in the pre-Qin period. It deeply explores the important role and manifestations of Yi-Xue thought in the cultural integration of Confucianism, Buddhism and Taoism, and strives to interpret and summarize the contemporary Yi-Xue research achievements from multiple angles and all-around.