Most of present physics teaching materials, such as Common Physics, College Physics, Thermodynamics,Thermodynamics and statistic physics, always take counterevidence to prove Camot theorem.

• 目前普通物理学、热力学及热统教材中,证明卡诺定理多采用反证法。本文给出了由热力学第一定律和热力学第二定律直接证明卡诺定理的一种方法。