Abstract: Evaluation of Seismic Safety for Engineering Site prescribe that it must test shear wave velocity for engineering site which detecting depth may be to 100 m, velocity maybe from 100 to more than 700 m/s.This paper outline new method which detect shear wave velocity in site using hang detectors instrument, and by real test result it explain this instrument satisfy test request,methods could execute,test results are faithful and filful code request.