The purpose of this study is to understand aesthetic world view of divided world describing irony among Oh, Kyu-Won`s poems. He tried to write experimental poems that kept objective distance between contradiction and decay of 70~80s industrial capitalistic society. As his strategic writing pattern on poems, the principle of dissimilarity is described as an irony that describes divided world with speaker`s two different views. In addition, this study is aimed to understand the relationship between existentiality and irony on his poems. In the chapter 2, Oh, Kyu-Won reflects existential self by standing unreal mask through ironic thinking speculation. He awakes real identity by digging into self-consciousness as a poet and essential problems about `death`. Even though he used timid losers on the surface of his poems, the truth of real identity is dissimulated on the behind of his poems. In the chapter 3, Oh, Kyu-Won introduces `advertising poems` by escaping from stereotype of poetry and by judging corrupted political and social reality of present with spoiled languages. He might want to criticize corrupted capitalistic society by parodying words of corrupted commercial advertising that includes false desire and hypocrisy. By doing so, he wanted to look for existential self. In short, Oh, Kyu-Won tried to secure truth of identity and world by ridiculing false self and by satirize corrupted present severely.