By using entropy and entropy production, we calculate the steady flux of some phenomena. The method we use is a competition method, $S_S/��+��={\it maximum}$, where $S_S$ is system entropy, $��$ is entropy production and $��$ is microscopic interaction time. System entropy is calculated from the equilibrium state by studying the flux fluctuations. The phenomena we study include ionic conduction, atomic diffusion, thermal conduction and viscosity of a dilute gas.