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.

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.

Quality Control method about point line side was point out in accordance with the basic point of cybernetics in the paper, and some contents of the method was discussed.