From the archeological perspective of Michel Foucault, this paper analyzes the tradition of social communication studies in Latin America in the 20th century, not only pointing out the discursive episteme of “social communication” with the theme of “development and liberation” and its six sets of discursive announcements: “functionalism”, “critical thinking”, “national communication policy”, “post (modern) paradigm”, “interdisciplinary practice”, and “birth of scientific consciousness”, but also elaborating on its fundamental discursive characteristics of “academic position”, “academic organizations”, “objects of study”, “transformation of epistemological perspective”, and “methodological perspective” which are different from other regions. The article concludes that Latin America’s communication studies are more of a technology to serve the development and liberation in Latin American society, they use communication knowledge production and common practice to produce a discursive grammar of communication thoughts different from Europe and America. Meanwhile it proposes that the localization of knowledge is not to copy others’ theory-methods, but to make a critical appropriation according to the local social, to construct local academic discourse, and to realize the combination of local consciousness and foreign communication ideas.