European principles of public administration are extremely important in the administrative system of each country. The quality of public services, the principles relating to the quality of regulations and procedures, and the principles relating to the conduct of civil servants. In particular, they analyze the principles of openness and publicity, which are important for the quality of public administration, but also for the relationship between citizens and administration. The paper also explains the concept of Europeanization, gives an overview of the concept of administration, states the basic principles that are the basis of action, decision-making and actions, which are further explained in detail in the paper. Modernization of public administration refers to increasing efficiency and effectiveness in the public administration system, increasing the level of quality of administrative services, higher level of openness and accessibility of public bodies, strengthening the rule of law, strengthening social sensitivity in public administration and in relation to citizens, respecting ethical principles in public administration and the eradication of corruption, the use of modern information and communication technology, the inclusion of Croatian public administration in the European administrative space, but unfortunately such an approach has not yet been achieved in our country. Public administration reform is needed to enable effective law enforcement in the Republic of Croatia and to create a transparent, user-oriented, rational, professional, efficient and effective public administration.