In this paper, we try to re-examine the subject about the rule of writing in Chunqui. It determines the difference between accustomed and anomaly, tells the right thing to do and the principles to follow by means of little words, rather then for recording the massive data of daily routine. It can be represent as “to explain the law of tree ancient kings from global view, to discriminate the microcosm of the detail of human relations; to identify the suspect; to distinguish right and wrong, to determine when should to action or hesitate, and to recognize the good and evil, the wise and the wicked, to preserve a collapsing country, to continue the ethnocide, to modify the disadvantage and to arise from decay, it is the major for the kingly way of government by justice”, the way to avoid extinction should be the base fir event civilization, to modify the disadvantage and to arise from decay should dependent on the construction of establishment, base on this, on can integrate two differences or separate two similar, form the style, and subject of Chunqiu, we find a new direction to interpret it, Chunqui catalogs by years, each year calendars by four seasons, Gongyang commentary shows the ideal of the meaning for respecting the king; it bases on the history of the Lu. Tree commentaries of Chunqiu makes the utmost of the internal and external function individually; once summarized the 22 sections, it shows the construction of traditional institutions more clearly. By using these ideals, one can understanding the spiritual principles in the cosmic point of view and to determine the discipline in the social point of view, it seems not only to carry out the concept of uniting everything under one system, but also hold the Main body consciousness, unless Chunqui, for thousand years, it is hard to support the unification of China, to construction the thought of country race, to make the distinction, to pay attention to one’s proper limit. The consideration of sages is so deep, for addition and taking off in the historical development, they created the model for posterity, serves a very good and deep purpose.