When the GPS static relative positioning is adopted for surveying, the reference stations are required to be setup at control points. Therefore, more time, cost and manpower are required. In recent years, the GPS reference stations have been constructed in Taiwan, these GPS stations may be treated as the reference stations for relative positioning. In this study, the GPS receivers were setup on the satellite controlling points of Taipei and Yilan, and the data from the reference stations with TWD97 and TWD97[2010] coordinates were utilized for data processing. Two approaches of e-GNSS and static relative positioning were adopted, and the standard deviations in horizontal direction in both areas were within 2 cm. When it came to the external precision, the maximum error of positioning precision was within 6 cm, which was in according with the standard of cadastral surveying. However, the positioning results after coordinate transformation were better than 6 cm in Yilan area averagely, there was still parts exceeding 6 cm in singular data. When the GPS data were processed by using the Yangming mountain reference station, the larger errors were occurred by using commercial software when the baselines were longer than 20 km. If the larger errors were excluded, the external precisions in horizontal direction in Taipei area were within 6 cm. On the other hand, the errors after coordinate transformation in Yilan area were 4.6~57.4 cm.