Informatization of public administration is a complex and long-term process that needs systematic approach. The aim is to reduce the costs and increase the quality of services to citizens and the economy. The current status of public administration information systems is intertwined architecture with many isolated parts that are not interconnected. Strategic guidelines at the state level are the basis for achieving the goals for all public administration bodies to work on a common IT platform, along with the linked business processes and services. The concept of enterprise architecture for public administration bodies can serve as a vision of the desired state and as an impulse for launching activities aimed at consolidating and modernizing the system. Since enterprise architecture serves as a link between business and technology, it can be the basis for linking separate business units of public administration bodies into a single system, while accelerating information sharing and raising the level of availability of the required data.