According to the 「Better Life Index」 presented by OECD in 2017, while Korea’s ‘Civic Engagement’ appeared to be high however indicators such as ‘Life Satisfaction’ and ‘Work-Life Balance’ appeared to be low. Especially, ‘Community’ rate ranked last in the list. This represents exposure of the limitation of ‘Civic Engagement’. In other words, as the opinions of citizens are not properly reflected in policy, it means that social conflicts has already been potentially existed in Korean society. These social complications have become maximized in Korean society and resulted in the candlelight rally 2016. The candlelight rally was the movement of reconfirming the power of citizen through the candlelight vigil. However, at the same time this movement gave consideration on what is needed to maintain continuous life force of ‘the power of citizen’. It has been a year since the candlelight rally ended, though the consideration on what detailed suggestions in maintaining the continuous life force of the power of citizen are still available until the present time. Therefore this paper will start with the consideration on sustainability of ‘the power of citizen’ shown by the candlelight rally. At the same time alternatives in the religious aspect will be suggested as a sustainable solution to social conflicts. Specifically the necessity of ‘Adult Education in Korean Catholic’ will be raised to foster mature citizens inside the church. In order that the reemergence of ‘public faith’ which is the social dimension of religious belief will be discussed forehand. And then this paper will emphasize that there is a new kind of demand on the role of ‘public religion’ in present day. On the basis of these discussions, the educational implications of ‘Adult Education in Korean Catholic’ within the boundary of ‘public religion’ will be addressed. The following discussion is about the possibility of ‘Adult Education in Korean Catholic’. The possibility of Adult Education in Korean Catholic will be considered through Adult Education in German Catholic (Katholische Erwachsenenbildung in Deutschland) Thereby, this paper will raise ‘Adult Education in Korean Catholic’ of Korean Catholic Church as to contribute in solving social conflicts.