The study focuses developing an effective mission strategy in a Social Network Service culture to reach the net generation in Korea. It asks these important questions: “What are the barrier for the Korean churches in evangelism to the net generation?” “How can Korean churches change their SNS culture in mission for the unchurched net generation?” In order to answer these questions, data was collected through questionnaires and interviews with members of the net generation in Korea. Both the characteristics of the net generation, and those of the emerging SNS culture in Korea, were analyzed.The effective strategies of Korea church mission was an important issues in this study of how best to reach for Christ the net generation in SNS culture. I think that experience of mission in the Korean context led N-generation to the strategy that the Korean churches need a mission approach using SNS culture. This evangelism is a challenge for Korean churches seeking to reach the net generation. Korean churches need to be develop the mission strategies using SNS appropriate for the Internet culture of the net generation. Such SNS must be part of an effective mission toward the net generation who embrace a SNS culture.