Zuo Zhuan is an outstanding literature work with a very high value of art attainments. The articles stated in Zuo Zhuan express with complete explanation in a strict style of writing that creates plenty of splendid sections and chapters, as well as the most charmful literature language. The article tends to observe based on the background of social development and historical culture under the line of dream sated in Zuo Zhuan, discuss the true inner secret of dream at the ground of description for the dream article in Zuo Zhuan. The article sets the inner secret of dream stated in Zuo Zhuan as the range of probe. From descriptions of these dreams, it is clear to see that dream can be a path for humandeity communication or future forecast. As being the instance, all kinds of dream can be treated either God’s instruction or omen; and the activity for dream divination turns to be a sort of culture phenomena. People faith profoundly trusts the revelation in the sign of a dream, and it is manipulated by the superior to be a certain level of conscious model that achieves the goal in the name of dream. Therefore, Zuo putting down in writing for dream actually reflects social reality and is involved with an important meaning of humane interpretation.