Introduction In 1922, Walter Lippmann suggested the very first agenda-setting idea in his book "Public Opinion", and Bernard Cohen (1963) said: "The media may not tell us what to think, but they are remarkably good at telling us what to think.” These concepts assumed that, given the limited capacity and innate curiosity of human beings, most people rely on media institutions. to obtain information outside the family, neighborhood and workplace. Therefore media organizations have the priority to choose which information is of sufficient quality to be the most important and which is not, and which information is emphasized by the media. could transfer relevance to the audience. To test this concept, McCombs and Shaw conducted the first empirical research study, which was published in 1972, since then the basic theory of agenda setting was established. After the first research was published, they retested the reliability and validity of that research and developed contingencies to strengthen and constrain this theory. Subsequently many researchers were involved in this field and began the details and extension of agenda setting theory. Weaver, Graber, McCombs, and Eyal (1976) extended the idea of ​​agendas to the domains of politics and campaigning. Since the 1980s the map of agenda setting has become increasingly complex. Under the theory of the origin of agenda-setting, the analysis of the importance of the media agenda relative to the public agenda, the agenda-setting process and the effect of the three levels of agenda-setting have detailed this theory. Furthermore, the idea of ​​agenda setting theory has been explored in several fields, which include political advertising, consequences and subsequent public behavior, international market and so on. Also, t...... half of the paper ......tion. vol. 43 Issue 2, p58. 10pm Tan, Yue; Weaver, David H. (2010). Media Biases, Public Opinion, and Political Liberalism 1956 to 2004: A Second Level Agenda-Setting Study, Mass Communication & Society, Vol. 13 Issue 4, p412-434, 23p Coleman, R.; Wu, H. D. (2010). Proposing emotion as a dimension of affective agenda setting: separating affect into two components and comparing their second-level effects, Journalism and Mass Communication Quarterly, 87(2):315-327Lei Guo; Hong Tien Vu; McCombs, Maxwell. (2012). An expanded perspective on the effects of agenda setting, exploring the third level of agenda setting, Revista de Comunicación. vol. 11, p.51-68. 18:00 Zhang, Guoliang; Shao, Guosong; Bowman, Nicholas David. (2012). What is most important to my country is not important to me: Agenda-setting effects in China, communication research. vol. 39 Issue 5, p662-678. 17p.