In　order　to　satisfy　the　certain　field＇s　special　request　for　component＇s　specialities,　the　authors　described　an　algorithm　based　on　Neural　Networks　by　giving　each　speciality　a　metrics　weight.　Instead　of　indentification　metrics　in　the　traditional　process,　this　algorithm　is　based　on　quantitative　metrics.　So　the　precision　of　component　metrics　is　improved.　The　algorithms　can　update　itself　by　machine　learning.