Abstract: In this paper,a kind of automatic deformation monitoring system is developed,which is based on the TS30,combined with GeoCOM technology,Visual C++ data base and data transmission technology.Accuracy statistics and inspection for traditional and automatic observation data is through internal accord accuracy,F hypothesis testing,and T hypothesis testing.By using case analysis,compared with the traditional method,the automatic deformation monitoring system has a great improvement in the time and accuracy of data acquisitions,which improves the operation efficiency of the field operation,and highlights the advantages and characteristics of automatic monitoring system in engineering application.This system will be used widely in deformation monitoring.