With the rapid development of IT in the modern society, various kinds of information such as smart information age are provided in real time regardless of time and place. Especially, various IT devices and mobile devices using the ubiquitous concept are being widely used in real life and helping to make life convenient. Currently, various ubiquitous services and management schemes are being tried in the government business field. This paper was performed to propose an augmented reality-based system construction and service environment plan for the management of underground facilities such as gas, electricity, communication, water supply, sewerage, heating, and oil pipelines. To do this, the author used Map API and JSON communication technique. JSON can be used in JavaScript programs without parsing or serialization. Also, JSON is a text-based way to represent JavaScript object literals, arrays, and scalar data. As a result, it can be transmitted in a format that can be interpreted in fields that utilize various types of data. Using this JSON, an augmented reality-based underground facility management system was implemented. In other words, it is a system that can find and modify the location of underground objects without drawing drawings in the field through communication between the tablet and the server. Especially, it suggested a method to provide and manage the location information of GIS (NGIS, KLIS) system and the facilities embedded in the underground, and attribute information by replacing the location mark used in existing underground facilities. Through the augmented reality based underground facility management system, it is expected to be effective in terms of practicality, economics, real -time network, information provision and management, and prevention of major accidents. In addition, it will be an effective method for updating and maintaining information related to underground facilities. Finally, by applying the augmented reality-based underground facility management system, it is possible to precisely measure the underground facility survey and condition for an existing buried pipe or a new public pipeline. Through augmented reality technology, it is possible to check the facilities of obstacles as if they were right in front of you. In addition, facility management, history management, and on-site management are possible at once, and it is characterized by convergence with other IT and quick decision-making by integrating the management system.