During the last two decades, national the legislatures mark significant changes regarding legislative of companies in the financial sector. In the first place, it is related to banks as their most important representative. Reforms became obvious especially aft er the world financial crisis, which was a way for avoiding the noticed negative factors, and these factors were considered to be an additional source of the crisis. The tendency of an increasing role, i.e. the power of national banking and financial regulators is evident for more than half of a century. The current situation is marked by the fact that national regulators have a very prominent position and authorization over banks. The process of formation of "supranational regulators" and legislative develops parallels with the mentioned process. This paper, in short, represents domains of national and supranational systems in the creation of the legal framework and control of banks.