The method and concept of a heat-engine-like plant were extended to the generalized transport processes based on the analysis of configurational characteristics of reversible heat engine and heat-engine-like plant，and a better mathematical foundation was given.It was proven by means of the variational method that the transport coefficients equipartion was the basic characteristics of a linear transport process system which pursued entropy production minimization when the material was subjected to overall constraints.The new idea of optimum configurational characteristics was preliminarily verified.