The purpose of paper Un Chien Andalou by Salvador Dali and Luis Bunuel is to investigate how the corresponding philosophical position of postmodernism influences the aesthetic values of the work of art, the film Un Chien Andalou. Surrealism, which is a part of the philosophy of postmodernism is defined as psychic automatism in its pure state, by which one expresses verbally by means of the written word, or in another manner, the actual functioning of thought. Surrealism is dictated by the thought, in the absence of any control exercised by reason, and devoid of aesthetic or moral concern. Surrealism is based on the belief in the superior reality of certain forms of previously neglected associations, in the omnipotence of dream, in the disinterested play of thought. It ruins completely all other psychic mechanisms and substitutes itself for them, while solving all the main problems of life. The postmodern philosophy challenges any clear and concise process of identification and definition as a part of rationality. Postmodernism rejects common sense and accessibility, scientific reason, philosophical logic, clarity or precision. On the other hand, postmodernism seeks to grasp those elements that escape these processes of definition, and celebrates what resists or disrupts them. A plurality of definitions has now come to describe postmodernism’s multifaceted nature. Examples of postmodern art relate to fracturing, fragmenting, indeterminacy and plurality. Postmodernism is the style of our age.