This thesis holds that the American Dreamin 1920s is impossible to attain.Gatsby’s whole life can illustrate this point and make it clear that American Dream is fragile confronting with the cruel reality and the idea that money can bring people everything,which includes social status,happiness and pure love,is inordinately immature and innocent. This thesis holds that American dreamin 1920s is impossible to attain. Gatsby’s whole life can see this point and make it clear that American Dream is fragile confronting with the cruel reality and the idea that money can bring people everything, which includes social status, happiness and pure love, is inordinately immature and innocent.