As a pioneer of Western modernist literature, Baudelaire used his works to set the tone for this branch of literature: abandoning tradition and finding a new way. Starting from his own creation, he made bold innovations in poetry themes, choosing the ugliness of the city and the dark side of human nature, and had the ability to capture the secrets of things behind the sound, light and color. He shows all aspects of life in the concrete images that he takes for granted. The poet refuses to idealize life in an empty way and refuses superficial pleasure and self-sufficiency. He wants to return to the essential level of existence, so he resorts to social pathology in his writing. Baudelaire believed that "ugliness is transformed into beauty through the expression of art, and pain with rhythm and rhythm fills the spirit with a peaceful joy." This is one of the wonderful privileges of art.