Upbringing and education are both a mission that society entrusts to the school in order to help children and young people become self-conscious and responsible participants in socio-political and economic life for the benefit of the whole community. Despite high educational standards, modern education systems do not fully achieve the desired educational outcomes, especially in upbringing. In finding a possible explanation and solution to the issue of upbringing, educational systems that have successfully achieved the desired goals for many years can be helpful, among which we highlight the Preventive System of St. John Bosco. Based on Christian anthropology, it contains the key elements for achieving a holistic education regardless of the student’s culture and nationality. The aim of this research is to examine whether elements of the Preventive System are represented in the current educational system of the Republic of Croatia and whether the current system values the religious dimension and lifelong teacher’s education. This paper in the first part offers an overview of the most important elements of the Preventive System. The second, more extensive part, presents the results of the qualitative analysis. We analysed the documents of the current educational system of the Republic of Croatia. The goal was to discover the possible contribution of the Preventive System to Croatian school system and religious education. The results of the research confirm the similarity of elements of the two systems, the partial validation of the religious dimension and the importance of the lifelong teacher’s education. While the contribution to the overall system is found in the fundamental values, the contribution of the Preventive System to the subject of religious education is found in the methodological-didactic area.