The topic of this thesis is Development and the Scope of Work of the Government of the Republic of Croatia and it further explains formation and the scope of work of the Croatian Government performed by its legislative authorities established within and outside the Government of the Republic of Croatia. According to the principle of separation of powers and according to the Constitution of the Republic of Croatia and its laws the executive power is vested in the Croatian Government and the President of the Republic of Croatia. Based on the will of people expressed in elections to the Croatian Parliament the Government of the Republic of Croatia is formed indirectly as well, by the power of the Croatian president who authorizes the mandatary to form the Government of the Republic of Croatia. The Government of the Republic of Croatia is the state authority and political body which, through its programs and activities, carries out policies for the welfare of the citizens and improvement of the society. The development and the scope of work of the Government of the Republic of Croatia has changed throughout history depending on society’s needs, progress and improvement in all areas, and especially after it has joined the European Union. All necessary issues are regulated by the Constitution of the Republic of Croatia and Croatian laws. In this thesis the Government of the Republic of Croatia, which exercise the executive power in the Republic of Croatia, is explained through its structure and the scope of work, decision making, and its relation to the Croatian Parliament.