Freud's psychoanalysis had an great influence on modern western civilization. He was known that he analysed the pictures of Leonardo Da vinci and the other contemporary writers and their works, and showed the different approach in the history of the criticism of art. Since antiquity the art as the concept has been related with the inspiration which is not different from madness. Compared with negative attitude in the classical age, the exceptional status of the modern art is contradictory. This contradictory relations between the art of the unreason and the lunatic of the unreason need to be explained. So this thesis is to chase how Freud touched upon the unreason as problem. He showed the exceptional attitude about art works, but applied the same theories to analyse him and his works as ones taken from his patients, nevertheless didn't call the artists the abnormal. Especially the unconscious, repression and sublimation as problematic concepts in his works need to be interpreted philosophically with the 'cogito' and 'signification' theory. This can be so called deconstruction. Through this approach his egocentrism finally gets to be broken down, his distinction between the normal and the abnormal gets to be obscure.