Abstract: The present disclosure relates a method for providing 3D GIS (Geographic Information System) web services using a web client and a server, the method including the steps of: in the server side, processing information to be transmitted to the web client; and in the server side, upon request of the web client, transmitting to the web client the information to be displayed on a screen of the web client. In the step of processing information, the information to be processed includes a main image and peripheral images around the main image, and the step of transmitting the information involves searching for a main image and peripheral images around the main image that corresponds to a request of the web client if the request includes information about an image to be visualized on the screen.