Construction Management System provides assistance in the online exchange and sharing of various documents related to projects, contracts, and processes between government agencies and construction companies that perform national road and river construction projects. The system is being used for the road and river construction projects at approximately 500 locations. The recent development of various information technologies, including big data, GIS(Geographic Information System), and cloud, has enabled construction workers to utilize information devices for their work. A plan for improving Construction Management System was suggested in this study by applying spatial information so that various map-based information services could be provided to construction workers. The suggested plan is expected to provide workers with the visual construction status, including the cost, by integrating construction information and spatial information, and to reduce the onsite work hours and efforts by providing customized functions for each user.