The setting group control models in IEC 61850 and IEC 60870-5-103 are analyzed. On the basis of models analysis, the setting group control model based on IEC 60870-5-103 is extendedly defined according to the setting group control block(SGCB) model in IEC 61850. The extended model makes the relay protection equipment based on IEC 60870-5-103 support the reading and writing services for the setting group stored in any subarea. Whats more, the setting group remote modification model is analyzed in detail via the setting group views, and a control flow is proposed to avoid data abnormal in edit setting group area so as to change remote reading and writing settings, which improves the reliability of setting group remote reading and writing remarkably. The application of the setting group remote modification model is successful and its reliability is confirmed.