Abstract: Literary creation is influenced by the writer's emotion and comparing Lu Xun's works in two times is beneficial for the deeper understanding of the change of his creation.Cry·Own preface and Collecting Morning Flowers at Dusk are Lu Xun's memory narrative,and they show the different sequences of image because of the different emotional impact.Lu Xun's cognitive difference to the society is contained in his different memory narrative,which is decided by his cultural view in different time. Collecting Morning Flowers at Dusk awakens his memory about folk life in his heart,and causes him to return to the folk cultural from the enlightment cultural,which not only causes his cognition about Chinese society to change,but also causes the metaphor meaning of "philosopher/ illiteracy" in his novel to change,and the transformation of Luxun's novel has completed.