The estimating system and index on the wall materials of China were established by estimating their life cycle quality and environment based on the comprehensive estimating theory.The wall materials were divided into the inside and outside wall.The weight value of various estimating indexes on the wall materials were obtained by expert system(Delfei method).The qualitative and quantitative analyses on 15 kinds of inside wall products and 11 kinds of outside wall products were done according to investigated data from experts,and then the comprehensive scores on the products were calculated.The research results in this project offered the bases for confirming the dominant products of the wall materials and the development program of new kinds of the wall materials in China.