The philosopher Ch'ang-Tze says: “The Great Learning is a Book transmitted by the Confucian School, and forms the gate which first learners enter into virtue.” The Book is the work of Confucian School, Tzeng-Tze inherited the teaching of Confucius, and therefore the Great Learning is the record of Tzeng-tze’s mental reaction. The article would try to explain the meaning of “The Way of The Great Learning is to illustrate the illustrious virtue.” There are many interpretation of it. The author points out a lot of viewpoints to make clear the meaning. In conclusion, the author’s point is that if you want to be a great person you should first understand your own nature which man derives from Heaven.