Ju is that which is a thorough knowledge of heaven, earth and man. Juism comprehends the knowledge of the three universal elements, and takes human Tao as its central part. I-Tao is the Tao of I-Learning, and includes Heavenly Tao, Human Tao and Earthly Tao. The learning of I-Tao originated from the original Ju scholarship, it was synthesized and developed by Confucius. From the ancient time, most Ju scholars considers that the learning of I-Tao is included in Ju-Learning (Confucianism).The I-Tao of Ju-Learning, in the human world takes Human Tao as its central part, it instructs people to manage ”time” and ”space”, and to achieve the good of Human Tao. The Heavenly Tao teaches us to study the Heavenly Principle, The Earthly Tao teaches us to study the principles of material things, and the Human Tao teaches us to obtain the principles of ethics. In the Human Tao, The I-Tao of Ju-Learning instructs us to sets up and follow social ethics, its significance is to create social welfares and to pave for the Great Harmony of the world.