The geographic system is an integrated framework encompassing natural and human phenomena on the Earth's surface and their interactions. While existing Geographic Information Systems (GIS) are capable of digitally processing geographic elements, their models typically rely on predefined rules and historical data, lacking bidirectional interaction between physical and informational spaces. This limitation makes them less effective in addressing rapidly changing and complex three-dimensional geographic environments. To address this issue, the research team at the Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, proposed the concept of the "Geographic Intelligent Agent" and developed the prototype, "EarthSage." "EarthSage" provides real-time spatial decision-making support in fields such as disaster response and urban planning. Journal of Geo-information Science has published the study's results.