Abstract:In order to achieve the intelligent design for products,research is conducted on feature expression of product by normal form,feature amalgamation hypothesis and coordinates transformation algorithm.Based on the research,the feature expression model of product is established; Then,with an analysis of the definition of total function,function expression,the function model of product is built.With the functions broken up,function feature mapping is achjeved.At last,based on the research of feature gene coding,the product’s function is described with gene coding.