This article discusses the way in which the Zagreb Police Department communicates with the media and the public, and on the other hand, the Croatian police generally as an institution and the Ministry of inner affairs of Republic of Croatia under whose police forces it belongs. In article will be possible to see development of public relations in police, why are they very important to the police, as well we can see a problems and difficult things through job by police officers in public relations and spokesmen. Especially when it comes to legal frameworks, regulations, and restrictions, for example when publishing specific data, and similar, when it comes to a crisis event or an event of great public interest. In the last part of the article, a survey of police communication as a public institution has been presented. Through the research it is able to see how perception people have about police, how they are value communication from police like institution to the media and publica, how is communication of police officers, and about presence and appearence of police through the media.