The church began on this earth through a new covenant relationship given through Jesus Christ. And in accordance with the nature of God, who delights in fellowship with us, the church community fellowshipped with each other in love, shared and shared what they had, and participated, served, and devoted themselves to God's work together. This could be called koinonia. For a long time, Koinonia has played an important role in connecting and growing church communities. However, modern churches that focused only on the functional aspects of koinonia for church revival and growth made the mistake of trying to program koinonia or apply it only to specific content, such as fellowship time. If you look at the early church communities, you can see that there was no separate program for fellowship. It was a community that worshiped and prayed together, praised God, took Holy Communion together, shared a common meal, remembered the words of Jesus Christ, and thought about grace. In it, each other naturally experiences koinonia. This study is a record of these concerns and efforts to apply them in actual ministry settings. What we must not forget is that koinonia is not something that only occurs through relationships between believers or between people. The Holy Spirit is with you in that relationship. The moment you think of it as a human relationship, you cannot reach true koinonia. This study is a report on the process and results of efforts to apply biblical koinonia to actual church ministry. Although this paper has many shortcomings, it is hoped that through this study, churches will arise that realize the koinonia of believers and believers, churches and churches, and churches and neighbors.