The object of study of management science is management practice: its patterns and principles of decision-making, leadership technologies and laws of power in achieving goals in real management situations. Of primary interest are those results of management science that make it possible to achieve success that is unattainable without their use, and become an integral part of the professional arsenal of a manager. For the first time, the main provisions of management science are presented systematically, from a unified position, using a single logically consistent system of definitions and management structures and technologies that can improve management efficiency. The basic laws of management are formulated. It is recommended for those who work in the field of management and seek to improve their professional level, as well as for everyone who studies the theory and practice of management.