Abstract: Anew system of rare earth elements analtsis is described in this paper.Inparticular,the main system allocation and function are elaborated,The maincharacteristics of the system are:1.It can calculate the contents of 12 rare earthelements in no more than ten seconds.2.all programs are written by INTEL8086/8088 assemble language and compile BASIC language,so it can make use ofthe system-resources of IBM-PC/XT.3.it can be applicative in rare earth mine-ral production and science research.In addition,the work puts the stress on themethod of software-design man-computer interface.X-ray spectrometer,regressioncurve,and peak correction-compensation are the main characteristic of the systemsoftware.