Introduction. The article is devoted to the work of Viktor Viktorovich Ivanovsky (1854-1926), a prominent jurisprudent of the Russian Empire, specialist in police law, sociologist, whose scientific activity was closely connected with the Kazan Imperial University. The contribution of V. V. Ivanovsky to the development of police and administrative law, political sociology, the theory of local self-government, and the methodology of legal research significantly influenced the development of police law theory in Russia. However, his ideological heritage has not yet received a comprehensive analysis. Methods. Methodological principles of research – the principles of unity of theory and practice, objectivity, complexity, comprehensiveness of the study of social processes and phenomena, the unity of historical and logical – are based on dialectics, acting as a general methodology of scientific cognition. The main methodological approaches of the study were systemic and value approaches. General scientific (historical, functional) and special (formal-legal, historical-legal, comparative-legal) methods of legal research were used. The method of problem-theoretical reconstruction and interpretation of legal ideas was very important. Results. V. V. Ivanovsky has showed himself as a jurist, scientist and historiographer. He characterised the formation of police-legal theory and identified the features of ideas about the means of public administration, models of relations between state bodies and the population of Western European and domestic thinkers.He revealed the interdependence of the sciences of police and administrative law; identified the features of the origin of the dogmatics of administrative law; substantiated the need to change the principle of regulation of public relations and the transition from the rule of law to the principle of administrative law.