This article examines the role of the banking institution in the circulation of money. The financial circuit of monetary means can be likened to the circulation of blood through the human venous system. A small malfunction can cause big health problems. This phenomenon can be compared to the monetary circulation in the country's economy. The national institution that aims to supervise and control the circuit of monetary means is the Central Bank (in the case of the Republic of Moldova – the National Bank of Moldova). Namely, this institution is obliged and has at its disposal all monetary policy instruments to achieve this objective. The supreme institution of banking supervision is the Basel Committee, whose objective is to understand supervisory issues and improve the quality of banking supervision worldwide, in order to increase financial stability, being the main global standard for the prudential regulation of banks. By Decision No. 63 of February 28, 2019, the National Bank of Moldova approved the Methodology for the supervision and evaluation of banks' activity, thanks to which the international standards and best practices in the field of supervision of the banking sector are transposed. The approval of the methodology is part of the process of reforming the domestic banking supervision framework and represents a fundamental step in the implementation of a risk-based supervision process, oriented to the future, with the use of professional judgment.