The purpose of this study is to answer to the request of current society to find and apply reformed cell ministry into traditional Korean Presbyterian churches in order to overcome individualism and bureaucratism as well as dismantlement and isolation within community that are taking place in traditional churches in the fast-changing 21st Century. This paper first looks at what Cell Church place importance on and these are shown in their church theory. First, Cell Church considers cells as small churches within the larger church. Second, cell churches consider cell group and large group congregation gatherings as two wings. Third, Cell Church theory\'s characteristic is that they act on the belief that all believers are priests and act on this even in the ministry work. That is, \'all believers are pastors.\' Fourth, cell itself is viewed as communal church. In order to understand cell church, the historical background behind the emergence of cell church and theological characteristics were studied. Regarding the pastoral theological characteristics of cell church, first, from believer theological aspect that is the spirit of cell church, there was rediscovery on believers and that they are recognized as missionaries, and second, from christian educational aspect, it was found that cell contains both characteristics and functions that small groups have. Next the similarities and differences between traditional small groups and cell groups of cell churches were studied. The similarities are that every time period requested for small group gatherings and that they both claim for recovery as a church presented in the New Testament through smooth harmony between small and large groups and that these forms of small group movements had continued on in the church history. The differences between traditional small group form and cell group are that cell is considered the essence of church, that is, cell is seen as the church itself and there is a difference in interpretation of the role of the spirit. Measures for actual application of reformed cell ministry work to the Korean Presbyterian church are first, presenting the role of pastor in the reformed cell ministry in the aspects of caring, management, and leadership. Second, for method to convert to reformed cell ministry, importance and conversion method of cell mission work were considered and rapid conversion method and gradual method were presented. As specific measure, providing vision, perspective conversion, cell leader preparation, system establishment and system application procedure were presented for actual conversion process to cell-oriented ministry. As for evangelism method for reformed cell ministry, evangelism through Oikos, community evangelism, evangelism through cell groups were presented. The conclusion of this paper provides application method of healthy reformed cell ministry. First, a church that balances the development of both small and large groups need to be established. Second, the church principle should not be to become biological community but organic community. Third, it is important to have balanced application of gift development and becoming sacred for the role of spirit. The believers can know that the role of the spirit need to be balanced out in the internal maturity aspect and in the ministry work aspect. Finally, in order to promote reformed cell pastoral activities, cell leader and members need continuous nurturing and support from the church level. This study will help the korean churches that have become segmented, specialized and pluralized in the 21st Century to see growth again and give vitality to the church. That is, if the theological aspect are correctly used through reformed application, the advantages of cell ministry principles would be of great benefit to Korean churches.