Preventive and intervention services in the early years of life are crucial for the development of the child, the strengthening of the family, and the future of society. A theoretical grounding of early childhood intervention and an overview of international trends and practices help to identify the points of policy intervention in Hungary and to define the directions for the development of the care system. Building on international experience, previous research and development results, the integration of the adaptable elements of coordinated, integrated service systems based on interdisciplinary teamwork into the Hungarian model will contribute to the development of a more efficient system. In this way, the problems of children with developmental differences, delayed development and at-risk will be detected and identified at an earlier age, and then they and their families could have access to appropriate, needs-based care and services in a timely manner.