Whole-process media, holographic media, all-participant media, and all-effect media have profoundly transformed the ways of information access and dissemination, thereby exerting an impact on the security of the ideological domain in colleges and universities. It is necessary to raise political standing and enhance the understanding of the significance of ideological work, to strengthen the construction of Marxist theory and consolidate the theoretical foundation of discourse, to firmly grasp the leadership of ideological work and enhance the leading right of discourse in colleges and universities, to strengthen the development of talent teams,to build a team of discourse subjects and enhance the discourse capacity of the publicity team, to leverage the primary role of ideological and political theory courses as the main channel to consolidate discourse positions, to guide the direction of university discourse with the socialist mainstream ideology to strengthen its ideological core, and to purify the online ecosystem and optimize the discourse environment; and continuously consolidate ideological security in higher education institutions in the era of all-media.