This paper aims to reveal the importance of media in communication and provide some suggestions for more effective Christian communication (sharing the gospel) through ‘media mission’ in Korea. Korean society has rapidly moved into new media era that involves multimedia and social media. These new media have enormously affected to Korean people's way of communication and life style. How can Korean churches utilize new media for more effective Christian communication? To answer this question, the researcher first describes the definition of media. Second, he discusses various types of media that have been used by Korean churches: printed media, electronic wave media, internet-multimedia, and Social media are discussed. Third, the researcher provides six suggestions for Korean churches to exercise more effective media mission: first, Korean church leaders need to see media mission from the standpoint of Kingdom of God; second, Korean church leaders should be sensitive to new media; third, Korean churches need to provide suitable church facility to people who are more exposure to new media environment; fourth, Korean church leaders have to organize a task force among early adopters for media mission; fifth, Korean church leaders need to vitalize a media mission committee to lead the mission successfully; sixth, Koran churches should provide active support for media mission.