In the face of paintings, people will have a variety of emotions, but it is not a matter of course that art can express emotions. Art itself cannot produce emotions, it is human beings who express emotions from the beginning to the end. Based on people's use of resemblance theory to express emotions through artworks, this paper probes into the nature of resemblance theory and the problems brought by the convention and seeks interaction of artists, audience and artworks in art expressing emotions. Art expressing emotion needs participation of the three, can not be one-sided demonstration. Resemblance theory is not invulnerable, but more of a hope to point to the root cause of this theoretical behavior, to thinking of the "mind", about this differentiating mind that defines emotion, the coexistence of empathy and prejudice, and so on. In addition, this paper also uses the uniqueness of ancient Chinese painting, which is different from Western art, highlights the connected forms of multi-emotion expression in painting art, and enriches and improves the research system of emotional expression in the field of Eastern painting art.