Abstract: Based on the example of Plato’s political philosophy, this article explores the phenomenon of supremacy of theoretical thought over practical thought, which is a universal trait of the classical Ancient Greek philosophical systems. The first part of the articled indicates the conceptual similarity of the two-level systems of knowledge of Plato and Aristotle in the role that theory plays in relation to practical thought. The second part of the article reconstructs the concept of Plato's philosophy of politics, outlines the key political strategies he dealt with, and provides analytical reconstruction of the democratic theory of politics, oligarchic and civil-political, where the latter is the reflection of Plato’s original political views. The final part is dedicated to the method of Plato's political philosophy. Analysis of the context of using the term “theory” by Plato allows reconstructing the key methodological characteristic of Plato's model of theoretical philosophy. The article also provides the typology of practical knowledge, and substantiates the reasons according to which the political philosophy, as one of the types of practical knowledge, had to adhere to the theoretical prescriptions that fully determined the content of political reflection. The paper reveals the central practical task of philosophical theory, which by Plato's plan was intended to cease the political strife in Athens using true knowledge. The thesis is substantiated that using theory, Plato sought to complete the history of practical politics and subsequently shift towards building the “ideal state” based on the laws that are mandatory for all citizens of the polis. The article also discloses the principles of complex interrelation of the three Socratic methods: irony, dialectics and maieutics, which in Plato's political philosophy manifested as a single complex method. It is demonstrated that the method fulfills a bonding function between theory and practice, which allows transferring the theoretical truth to the sphere of practical problems of politics.