In his magnum opus,An Inquiry Into The Nature And Causes Of The Wealth Of Nations,he distinguished the differences between the value of use and the value of exchange. Then he illuminated his own value theory.

• 在其代表作《国富论》中区别了使用价值和交换价值的概念,提出了自己的价值理论,从而确立了其在经济发展史上的重要地位。