The invention discloses a dynamic scheduling and rendering method of voluminous web-end television-network resource GIS data. The method includes the steps of (1) making hierarchical display rules of the television-network resource GIS data, and displaying different equipment types and voltage classes in different measuring scale ranges; (2) conducting classified compression on line data in different measuring scale range; (3) according to the viewport scope, conducting dynamic data dispatching through a client side; (4) constructing images on drawing canvas of a map to achieve real-time signified rendering. By using the dynamic scheduling and rendering method of voluminous web-end television-network resource GIS data, fluency, interactivity and flexibility of the existing electric power GIS application in the aspect of Web graphic display are extremely improved, as well as user experience.