through the analysis of the input and output of goods, industrial chain is considered in this paper: for any commodity in the industry chain and GDP, and the final product price are equal, so the impact on the consumption of GDP is directly; influence of investment to GDP is more complicated, because the investment specific effects on the GDP not only depends on the input factor, output rate, organic composition of capital, need to realize through the consumption way to; the use of modern computing technology, analysis of different commodities industry chain, can accurately measure related to consumption, investment on GDP specific effects, related to the entity economy monetary demand.