This text uses the grey theory related principle and method of degree, Henan province wheat suits of peanut 7 that area test join the variety of trying on comprehensive 2001~2003 such as appraisal. The result showed that appraise and keep the same with traditional output result with weighting related degree to peanut breed, 100-seed weight, 100-grain weight, yield per plant, full-pod rate and offer the rice rate are dominant in affecting yield, but main stem height and side branches length are not dominant in affecting yield, the method is simple, easy to master.