Authors combine financial theory with cybernetics and system theory to prove and elucidate a new bank management method: the cybernetic system of commercial bank asset liability ratios management.

The bucket theory of economics utilized in the evaluation of system qualities and the black box method in cybernetics being took as an important method of system study were expounded superficially.

This paper, in the first place, attempts to analyse the functions of that subsystem and various relations of dependence and interaction by means of system theory, information theory and cybernetics.