Resumen
The article considers the main issues of designing a system for determining the risk group of accounts of the social network Vkontakte, that fall under the influence of a suicidal quest aimed at children and adolescents. To describe the architecture of projecting system used UML (Unified Modeling Language). It is a unified modeling language that is designed for visualization and documentation of object-oriented systems and business processes with an orientation to their subsequent implementation in the form of software. During the design process, a series of UML diagrams describing the system as a whole, its static and dynamic aspects, as well as the features of the functioning have been developed.