At the beginning of this final work it will discussed the basic concepts of macroeconomics. The way financial market is functioning the way money supply is formed as well as the demand. After that, the focus will be on the monetary policy as one of the mail components of macroeconomics. The goals of monetary policy as well as the instrument and ways that are used will be analized. As very country has its own central bank the supervises the work od other business banks, the main focus will be on the Croatian national bank. Numerous statistical data and examples from practice will facilitate the understanding of the theoretical part. The main objective of the central bank is to maintain the price stabilitiy and it is mostly focused on this goal. All these operations are performed by CNB through it instruments, and thoes operations are open market operations, mandatory reserves, on-going available facilities and other instruments and measures. At the end, the issue of introducing the euro as the official currency of payment will be discussed, as well as the reasons why Croatia still does not meet the conditions for Euro introduction and lots of effort should be put into it to chance it.