The relevance of the research lies in the fact that a clear definition of the legal status of procedural relations subjects of a public nature will contribute to an effective activity in the field of law enforcement and law enforcement activities in the future. The purpose of the study is to analyse the legal regulation of the status of the specified subjects in criminal and administrative proceedings. In accordance with the set goal, the task of the research is to determine the structure and content of the legal status of the subjects of procedural relations of a public nature, to analyse the current legislation of the Republic of Azerbaijan, which regulates their legal status, as well as to clarify and distinguish its specifics in criminal and administrative processes. When conducting the research, general and special methods of scientific knowledge were used. The result of the research was the substantiation of the proposition that the function of establishing law, stabilising social relations, is most clearly expressed in relation to the procedural status of various subjects: establishing the basic rights and freedoms of a person and citizen, the competence of bodies and officials, the legal personality of individuals and legal entities. The conclusion of the study was the argumentation of the position that the advantage of procedural legal personality in administrative and criminal proceedings, compared to the status of other subjects of procedural relations of a public nature, is the strict enshrining in the legislation of the procedural rights of participants in administrative-procedural relations and criminal-procedural relations and possibilities of their implementation. When conducting the research, the ScienceDirect search tool was used, with the help of scientific articles relevant to the topic of the research were selected, which were analysed during its implementation.