In the last decade, scientists are expected to present their researches. It is symbolized as the term: "science communications" and "inter-discipline communications." We suggest and explain "Presentation Competition of Graduate Students" (PCGS). In October 2011, we, Tsukuba Graduate students' Network, conducted PCGS during a university festival and proved its effects. As results, various multi-discipline communications have been promoted among University of Tsukuba. In our university, there are few cases of the collaborated researches which leverage the opportunities that the university has almost every discipline. In this paper, we suggest PCGS as a solution of the problems and demonstrate the details about the implementation plans, strategies and results. We also inspect the impacts as evaluations with the interviews of each concerned, e.g. speaker, judge and visitor. We expect that the PCGS will be held at other universities.