Buddhism took poetry as the major expression of its sentimental ideas and principles, especially after Buddhism naturalized into China, it has been a warming phenomenon that Buddhist favorite expression of spiritual world has been poetry, and it took it as the needs of delivering its principles. There is a Chan branch in Buddhism and many popular stories told by this branch were criticized by serious historical examinations of their true nature of its favorite stories, but, if we review them from the poetry tendency of Buddhism, we can understand why they were told that way, and we can see their aesthetic values. The evolution of Buddhist and Chan Phrases into poetry means that it reveals some natures of poetry as uncertainty as well as un-falsehood,which is the best way to express the world and deliver the truths. Poetry is without falsehood is the real true virtue and beauty and it provides the unlimited possibilities for the merging of poetry and Chan. The two can create a best state in the delivery of arts.