| In the middle of the twentieth century, American culture began to rise rapidly and replaced Europe as a new center of world art. For this historical process, in addition to the analysis of the art form from the perspective of art history, the development motivation and internal logic of the American cultural system has become the focus of attention and dispution in the academic circles.The article choose the evolution of American national cultural characteristics of in the middle of the 20 th century for perspective. With the aid of the art science, sociology, political science and communication theory, this paper study the evolution, connotation and operation pattern of the central cultural management, civil society and cross culture communication. Based on above analysis, the article also discuss the process of cultural system changes caused by the modernization of the Protestant society in longitudinal surface layer, and the relationship of mutual promotion and structure of its national cultural characteristics, culture system and development of culture in the lateral dimension.Taking the identity of national cultural characteristics as the perspective to examine the postwar America, the United States itself is in a complex transition period in addition to the development of business, science and technology and international status. The economic, social and political changes of consumerism, multi culture and spiritual vacuum state of American Society create a continuous impact on the dominant position of Puritanism. Meanwhile, the traditional thought and the Protestant ethic has thus been questioned, and led to many contradictions in society. Therefore, the culture and identity crisis, which are produced under the conflict between the new and the old national cultural characteristics, have objectively led to the transformation of American cultural system.In this period, under the guidance of the federal limited funding, law, tax incentives and public services by the federal government of the United States, the non-profit organization such as foundation, community, public radio, art community and the business organization such as galleries, theatre, film company, transnational media in American society,structure a "Cultural Society" between the mutual promotion and mutual restraint which seemingly loose chaos in reality full of vitality. As the macro environment, the continuous interaction of cultural system in American culture reached a balance and agreement between the centralization of state power and local autonomy, elite and democracy, commercial and art self-discipline, political interests and sub-cultural needs. Eventually, it completes the construction and improvement of American culture system by a way of social integration instead of the system integration. As a comprehensive product of cultural identity and political identity, American national cultural characteristics not only promoted the development of American culture, but also completed the integration and reconstruction of American identity. |