The article considers the scientific diplomacy — a relatively new phenomenon in international practice — as a type of diplomacy which took shape quite recently, in the 21st century, with the advent of both the term itself, and the corresponding concepts, and the Foreign Ministry units of some countries. However, it is necessary to clarify the terminology and essence of this practice, which has a much more long history. At the present time, there is a reassessment of this historical experience, as well as another attempt to put science in the civil service in one more — diplomatic aspect, as it has already happened with the military, educational and some other areas. At the same time, the scientific community itself in this process has the opportunity to play not only the role of an object or a passive performer. The demand for science is clearly manifested in periods of war and conflict, which in various forms do not stop today. This causes the urgency of the problem. At the same time, the conscious activity of politicians and scientists is combined with objective, independently developing, incl. latently, unobviously, by the processes of political struggle and scientific knowledge, which leads to complex combinations of interrelations between politics and science. The study of such events and processes allows us to draw some conclusions regarding relations between science and diplomacy, to determine the trend of consistent “scientification” of diplomacy, like of any other sphere of society, the transition from diplomacy-mail (communication) through diplomacy-art to diplomacy-science, formulate a hypothesis that diplomacy in general is a scientific project.