This graduate thesis presents the scientific communication of the Public Relations Office of the Ruđer Bošković Institute. By presenting a change in the communication of scientific information in the media, we have emphasized the importance of public relations services in the communication of scientific content. We have outlined several techniques and methods that science communicators should use to convey the desired message to the media and the public. We also presented at the Ruđer Bošković Institute and stressed the importance of maintaining media training for scientists and communicators of science. The aim of this graduate thesis is to study the scientific communication of the Ruđer Bošković Institute, to examine whether it is adapted to the media and the targeted public and whether it should be further adapted to the general public. We first analysed the press releases of the Institute's Public Relations Office as a way of communicating with media. After that, we analysed articles published on their official website as a channel of public communication. For the latest survey, we have conducted three interviews with two scientists participating in science popularization projects and a representative of the Public Relations Office. By carrying out the research, we confirmed one hypothesis and partially confirmed two others. The first hypothesis "The Press Releases of the Public Relations Office of the Ruđer Bošković Institute are not sufficiently adapted to journalists who are not specialized in scientific reporting" was partially confirmed because only the media reports that spoke about scientific research and discovery were not sufficiently adapted with regards to language and style for the average journalist. The second hypothesis; "Ruđer Bošković Institute has an obvious tendency to inform the public about its own activities" was fully confirmed. The third hypothesis; "Scientific Communication of the Ruđer Bošković Institute needs to be adapted to the general public" is partially confirmed because the science communication addresses people who are already interested in science.