This study seeks to understand ‘what the understanding and practice of Catholic Social Teaching means’, ‘how the understanding and practice is learned’ and ‘what should be done the programme for the learning’ through qualitative action research. The case of action research is a workshop conducted by the Andong Council of Justice and Peace which was conducted at local church of Andong diocese from 2016 to 2017. The workshop was a process whereby participants talked about the topic of Catholic Social Teaching, and the researcher worked as an operator to research for practice and to practice for research. I expected that social life and faith would be integrated through workshop of the Catholic Social Teaching. However, I was disappointed with the expectations of the former part(2016) workshop. In the later part (2017), especially the 4th workshop, I realized that the understanding and practice of Catholic Social Teaching is a complex, multifaceted and qualitative phenomenon. The participants showed a dynamic view of topicalization, practicalization and community process in their situation and context. There is lack of contents in this study. But there is a new dimension of Catholic Social Teaching education in the sense that the laity has become a main agent and his understanding/practice has become qualitative action research of the field of living in this stud