In this review on the basis of functional systems theory developed by P. Anokhin theoretical approaches to informative mechanisms of systemic organization of psychic activity are presented. Author formulates the conception on discrete system quantums of psychic and behavioral activity from needs to its satisfaction and develops its informative equivalents. It was shown that informative equivalents of needs and its satisfaction are reflected in structures of action acceptors in the form of dynamic informative images. On the basis of acceptors of results of action informative systemic quantums are developed which constantly control its manifestation in behavioral systemic quantums. Informative systemic quantums are extracted in advance by predominate motivations and are associated with negative emotions of needs and positive emotions of their satisfaction. The content of this review confirms I.P. Pavlov's foresight on possible confluence of material and idealistic processes in psychic human activity.