As a theoretical hypothesis, "agenda-setting function" was first seen in a paper entitled "Agenda-setting function of mass communication" published by American communicators M.E. mccombs and Donald Shaw in Public Opinion Quarterly 1972. This paper is a summary of a survey they made during the 1968 US presidential election on the influence of media election reports on voters. From 65438 to 0968, mcmanus and Xiao conducted a survey on the presidential election to understand the influence of the media agenda on the public agenda. 1972 puts forward the theory of agenda setting, arguing that mass communication often cannot determine people's specific views on an event or viewpoint, but by providing information and arranging related topics, it can effectively influence which facts and opinions people pay attention to and the order in which they speak. Mass communication may not affect people's thoughts, but it can. Agenda setting is an important way for mass media to influence society, and its views mainly come from political science. Lippmann's "Public Opinion" first put forward this idea, which is regarded as the foundation work in the field of communication.