Good communication between members contributes to coordinating and resolving conflicts within the organization (Lee et. al., 2012). There was a special office space on the 3rd floor of the main building of Cheongju City Hall. That was BICHAENAUM, named after "Empty, fill, and share, and newness springs up." In BICHAENAUM, about 50 officers from three departments worked freely in an open space. In this study, in preparation for the expansion of spatial innovation in the Cheongju City Hall, was to analyze the work relevance by the department and refer to the arrangement of departments with high relevance in the same space. The working relationship between departments was examined through social network analysis. As a result, departments in Cheongju City Hall were classified into 9 groups. In the long term, we hope that this study will serve as a basis for achieving the goal of improving working methods for spatial innovation.