The invention provides a service data access and processing method and apparatus for a scheduling master station. The method comprises the steps of customizing a model data object set, a real-time data object set, a graphic data object set, a file data object set and a historical data object set, and performing model data, real-time data, graphic data, file data and historical data access on a substation; and processing model data, real-time data, graphic data, file data and historical data sent to the substation. An object-oriented service data interaction method is proposed; the bottleneck of interaction among the scheduling master station, communication and the substation is broken through; the restriction that the scheduling master station and the substation perform real-time data protocol transmission through a dot mark index table for a long time is broken through; the data on-demand acquisition is realized; and starting from real-time and historical data requirements for the substation, the interaction among the model data, the graphic data and the file data in addition to conventional 'four-remoteness' and alarm information is supported, so that the capability of interaction between the scheduling master station and the substation is greatly improved.