The theory and doctrine of Operational Art and their relationship is a significant issue for the
theoretical development of Operational Art due to its orientation towards the application
of the practical activity of people in the operation. The issue of the scientific development of
the theory of Operational Art cannot be considered only as a state but as a process, as well.
The theory of Operational Art includes objective facts, and other structural elements of the
theory of operation, obtained by studying its past and present. On this basis, the theory
of Operational Art provides its future form and characteristics. Therefore, the authors in
this paper examine in detail definitions of the terms theory and theory of Operational Art,
definitions of the term doctrine, military doctrine and doctrine of Operational Art and
finally the relationship between theory and the doctrine of Operational Art.