The invention provides a customer service guiding method based on a grid GIS (global information system). The method comprises the following steps of guiding a user to transact corresponding business at the nearby branches through searching service resources near a pre-warning business hall; and guiding the user to go to an idle branch according to the address provided by the user through positioning the geographical positions of the branches according to the numbers of the sales branches. The method has the advantages that the method is simple and effective, and is convenient to clients; the service resources can be rationally used; the service quality of an electric power company is improved; the working efficiency of staff is improved; and the service efficiency of the clients is improved.