This paper will study on the films of Chang-dong Lee, focused on <Green Fish>, <Peppermint Candy>, <Oasis>.These films concentrate on the internal mind of hero and heroine who react actively to social reality around their environment. Also these films share another common thing which retain to strong emotional tie with spectator, based on the sympathy through the identification of hero. <Green Fish>, < Peppermint Candy> <Oasis> represent to the mixture of realism and de-realism.. Specially <Oasis> shows the mixture of the realism and fantasy. This Quest for the films of Chang-dong Lee will include discussion of a critical attitude from realism, discussion of de-realism factors, and study of screen fantasy from the respective of psychoanalysis.