The invention relates to a GIS-based power dispatching data graphical display method comprising the following steps: (1) an equipment correspondence table of a GIS platform and an SCADA system is established; (2) the path and interface format for requesting map data and scheduling data are defined; (3) a GIS platform service is called and scheduling data is requested to the SCADA system; (4) a data request is sent to the SCADA system; (5) the SCADA system receives the request; (6) the SCADA system generates a data message; (7) data returned by the SCADA system is received; (8) the SCADA data is analyzed and processed; and (9) the data is positioned and output. According to the method of the invention, the installed file is small, the access path is simple and clear, and the goal of power dispatching data graphical display is achieved by making use of a power grid GIS platform map and a topology service and based on the equipment correspondence of the power grid GIS platform and the power dispatching SCADA system.