The negative effects of the global financial crisis shook the more or less all countries of the world. The problems caused by the global crisis in the Republic of Srpska are most pronounced in the financial and real sector of the Republic of Srpska. In the current financial crisis, the Investment Development Bank receives a key role in the financial support of Serbian economy. A stable and efficient financial system plays a role in achieving the objectives of economic expansion. FINANCIAL sector capital strengthening the financial crisis imposed as a necessity, especially for smaller banks. The problems caused by the global crisis in the Republic of Srpska expressed primarily in financial and real-sector. The main objective of this paper is to highlight the importance and role, and the advantages and disadvantages of financing the development of financial and real sectors of the global financial crisis. The paper elaborated analysis of the degree of development of financial and real sectors of Serbian, conditions in the banking sector and the role of Serbian Investment and Development Bank of the Republic of Srpska in the development of financial and real sectors of Serbian. As a result, an analysis should highlight the importance of financial support to banks in developing financial and real sectors of the global financial crisis.