One of the central tasks of the central bank is to supervise commercial banks in order to maintain stability among banks. The CNB is the central bank of the Republic of Croatia, which regulates the payment system and thus maintains a financially stable system. The Croatian National Bank is governed by the Constitution of the Republic of Croatia (RH). It is responsible for continuous monitoring, price stability in the Republic of Croatia, maintenance of current payments at home and abroad. The profit of the Croatian National Bank belongs to the state budget. The financial statements of the Croatian National Bank play an important role in the composition of each financial year in accordance with regulations and standards. The main instrument of its monetary policy has deviated from interventions in which it has avoided excessive exchange rate fluctuations. This paper primarily examines the impact of the Croatian National Bank on the Croatian financial system in the period 2014-2018 and its financial statements in 2018 compared to 2017. This will prove a detailed study that will show the growth of economic activities and how to achieve economic activities in the export of goods and services. On the basis of the visited views, items from the area of regulation of the Croatian National Bank such as monetary policy, international reserves and financial stability will be selected. Based on the presented data, it has been proved that the financial system of the Republic of Croatia shows a certain stability and point of certain problems and insufficient stability of the system itself.