This study examines the acceptance process of "Open Worship" in a Presbyterian church, Y Church, to which has been paid attention as one of the most significant religious cultural phenomena in Korea since 1990s. For the purpose, it is necessary to understand the whole context of Korean Christianity in which the newly changed worship style has been forming on the one hand, and to focus on voices of diverse groups in local church on the other hand. The ritual change in church is relevant to the change of circumstances both inside and outside the Korean Christianity. Since Korea achieved democratization and moved into a consumer society at the end of 1980s, concerns for popular culture have increased in Korean churches adopting popular culture in accordance with the sociocultural change. Effort to appropriate secular culture as Christian one resulted in the popularity of so-called Open Worship, which was characterized by shouting and applause, electric guitar and drum music, audio-visual media, and personal testimony. In the case of Y Church, there were two opinions about Open Worship in local church: young advocates who supported an enthusiastic worship, and old believers who preferred a ceremonial service that features organ music, choir singing, and sermons. Each group of church community deployed religious discourses to be advantageous for justifying their own standpoint. Even though standardization of ritual was correlated to authorities or opinion makers in church, they reduced ritual change into a fundamentally religious problem by making religious statements of the sacred and the profane, sincerity and faithfulness, or biblical principle. The controversy surrounding ritual change ended up in the coexistence of traditional worship and Open Worship. In order to solve the problem of the decline in Protestant population, church leadership determined to provide support to youth group. Besides, reformist ministers created an atmosphere, in which conservative believers could adapt the ritual change, by running a retreat program and encouraging them to participate in it. All church members did not completely approve Open Worship, but the opponents` perspective on Open Worship began to change. Some of them were persuaded by the reason of the revival of church, and others allowed young people to celebrate Open Worship in the main hall on sufferance rather than opposed to the decision of church leadership. Still, others turned to adoption of Open Worship with new religious experience in the retreat. Open Worship, on the one hand, was strategically used by Korean church to produce a modernized and attractive image instead of impression of a separated community from the secular world. On the other hand, Christian ethos and religious discourses, which were emphasized by different church members, revealed the correlation between religious knowledge and power. In conclusion, successive communication in church to accept Open Worship suggests how "worldly" popular culture comes into "holy" church.