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Yi-ology belongs to the philosophical knowledge that studies the operation law of everything and its relationship under the guidance of the corresponding academic thought of heaven and man.

Since the Spring and Autumn Period, China's scholarship has been integrated with Yi-ology, with Fu painting divination, and official learning has gradually evolved into private learning. There is a gradual development before and after the Yi-ology, and a hundred schools of thought contend, so it is easy to divide. Since Confucius praised the Book of Changes, the Book of Changes has always been regarded as a Confucian classic, the first of the six classics, but it is outside of Confucianism.

From the development history of Yi-ology, the pre-Qin Yi-ology developed into two branches: Confucian Yi-ology and artist Yi-ology. Later, Qin Shihuang burned books, and I Ching was immune to it, but I Ching reached its peak and declined. This general trend of the two major schools of Yi-ology was not revealed until the pre-Qin period: through Dong Zhongshu's numerous expositions in the Spring and Autumn Period, the trend of Confucian Yi-ology became clear; Through the study of using different disasters, the changing trend of skills and quantity is clear.

Yi-ology originated from the Book of Changes, or Yi-ology for short. It is the crystallization of ancient thoughts and wisdom, and is known as the "source of Tao". It begins with occupation, but it is higher than occupation.

The Book of Changes records many ancient historical events, so the Book of Changes is based on practice. The Book of Changes is the oldest, most systematic and heaviest work in China culture, and it is the foundation of human culture in China and even the world. Yi-ology is divided into Confucian Yi-ology and Yi Shu Yi-ology. In the process of development, Yi-ology gradually divided into image Yi-ology, mathematics Yi-ology and Na Yi-ology. Sany had a special teacher in the pre-Qin period.

The main founders of Yi-ology are Fuxi, Shun Di, Zhou Wenwang and Confucius.