The wide application of ATLAS language lies in its characteristics of signal basement,test object orientation,independent of test equipment,etc,and is general language in test field for writing test program and descripting test requirements.Design procedures are described in detail in this paper,and VC++6.0 software is used to write the indicator’s automatic test program of magnetic heading system heading precision and it is achieved by ATLAS language,at last, by GPTS3.0 general automatic test platform and ATLAS language to realize the automatic test program of indicator.Test results show that autotest system of a indicator based on ATLAS language could get predicted results.