Abstract: Throughaccurate and multiple differential GPS (ProMARK X-CM),a program of dynamical monitoringreclaiming coastal land, concerning field data collection, data process and map match withTM image was established in study area, Tongming Sea of Zhangjiang and He'an Township ofXuwen County, Guangdong Province. The research results indicated that (1) Using GPS dataas control points, the precision of geometric correction of TM image was raised. (2) Aidedby the GPS data, the classification accuracy of TM image was improved. (3) The GPS couldbe able to collect current data of enclose tideland for cultivation engineering.