Abstract: The Mainstream Ideology has very complicated forms, and when it is formed, it would certainly exert an influence on our realistic society.In our life, the mainstream ideology sometimes fall short of the purpose which pursued by the implemental subject of it, even be in conflict between the "mainstream" and "popular" consciousness, "upper" and "non-governmental" consciousness.For maintenance the "legitimacy" of the mainstream ideology, some "technique" of propaganda and communication need to be designed, also, perhaps the most important is to study the mechanism of formation and communication of the mainstream ideology itself.Under the influences of various social factors, the mainstream ideology takes on character with class, particularity, etc.In contemporary society, the mainstream ideology faces the different challenges that due to information technology.We must pay attention to the social function and the legitimate foundation of mainstream ideology, consciously construct the new mainstream ideology adapt to new era in our communication.