The objective of our research is to understand the innovation pattern of South Korean mobile telecommunication service. In the paper, the case study about SK Telecom was conducted in order to achieve the goal. Especially, the institutional intervention model was adopted as a conceptual map. Based on our qualitative research, we captured the South Korean government did two major roles, which did drive radical innovation. The role of a navigator and the role of a coordinator were investigated under the research methodology, which was framed by Benbasat et al. (1987). The findings of the research contribute to understand roles of the government in the perspective of the institutional intervention model.