The purpose of this study is to suggest a new ministry paradigm based on missional church, in order to overcome as well as understand the challenges and crises that the Korean church is facing, as it moves onto a declining stage following after the stage of its growth and expansion in the mission movement perspective. The main study was carried out in three parts: (1) contextual analysis, (2) meaning and characteristics of missional church, and (3) principles and ministerial applications to the Korean Church. First, in an attempt to understand the background of missional church movement, Eddie Gibbs` five mega trends in the western church and sociocultural context are exemplified: from modernity to post modernity, from the industrial age to the information age, from the Christendom era to postChristendom context, from production initiative to consumer awareness, and from religious identity to spiritual exploration. With the changing context, many institutionalized traditional churches lost the missional vitalities and dynamics, dealing with missions as a function among various ministries. It is important that the local church must recapture the missional identity as the nature, acknowledging the urgent need of mission for the postChristian era and participating in the missio dei. Next, I analyzed the main characteristics of missional church which were formed by scholastic works and found several principles: 1. Significance of missional ecclesiology; 2. Rediscovery of missional disciple community; 3. New understanding and approach on mission field; 4. Incarnational ministry rooted in local community and culture; 5. Cooperative ministry based on eschatological perspective in the Kingdom of God. In order to have thorough discussion on missional church, it is required to have the understanding obtained from existential and ontological dimension, which is the basic requirement for the balanced ministry expanding God`s Kingdom to the world through its being and doing. In the last part, it is alarmed that the Korean church is confronted with more difficult and complicated situations than western Christianity because the Christianity in Korea had never played the central role in the process of civilization. I proposed a new paradigm with seven practical suggestions: 1. to be sensitive and enthusiastically responsible for changes, 2. using the culture as missional tool, 3. balancing between internal and external ministry, 4. serving local communities and involving church members in volunteering, 5. converting from programcentered to peoplecentered focus, 6. practicing ministries and missional works based on the kingdom perspective, 7. attempting various ways and models. In conclusion, the Korean church is facing to challenges and crises occurring in the secularized, pluralized, and globalized world and needs its creative ministry taking this change as a missional opportunity. I believe that only thorough reflection and efforts encouraging participation in God`s mission will bring a new missional renaissance to the Korean church.