In the perspective of Original Sin theory，this article criticizes the function of the mass media in city，and tries to analyze the far-reaching negative impact of mass media on city spirit．The essence of Original Sin theory is the profound reflection on human egocentrism．Post-modern cities have long been the subjects of cultural criticism．Mass media not only reflects and satisfies primitive human desires，butalso creates and advocates new desires．This has resulted in the development of numerous abnormal cities in the world featuring in wrath，greed，sloth，pride，lust，envy，and gluttony，which may accelerates the erosion of human nature by city desires．