The features of reforming the fundamental institutions of administrative-legal science in modern political and legal conditions are considered. The conceptual apparatus of administrative law currently does not meet its purpose, especially in the category of “public administration”. Using the example of German administrative law, the coexistence of various educational courses is substantiated, including “the doctrine of management”, “general administrative law”, “police law” and “public order law”, which are independent academic disciplines. Corresponding differences are also accepted in Germany when conducting scientific research. In the new political and legal conditions, the subject of administrative law lies primarily in the study of the basic institutions of executive power, while theoretical postulates must correspond to their pragmatic purpose. The subject of study of the new course of administrative law should be not only its traditional categories, but also the concepts of “public property relation”, “special public body or organization”; in relation to the latter, the study of the organizational and legal forms of activity of state corporations in their relations with the executive power.