Abstract: The subject of this article is the circle of international legal problems in the area of legal regulation of the institution of exhibition and trade fair activity on the circumstances of its functional nature and representational orientation as one of its comprising institutions within the common system of institutions of international economic law. The object of this research is the public relations that form in the process of cooperation of the member-states of the global community by the vector of juridical regulation of the institution of exhibition and trade and fair and congressional activity in the context of international legal security. The scientific novelty of this research consists in a detailed examination of the institution of exhibition and trade fair and congressional activity as part of the common system of institutions of international economic law, and determination of the specificity of the legal regulation of relations in this sphere. The author formulates the legal hypothesis, according to which he makes a conclusion on the interconnection between the provision of legal security of the member-states of the international community and the institutional-legal spectrum of science and practice of international economic law, including the institution of exhibition and trade fair and congressional activity.