  In this paper, we study the low Mach number limit of the full compressible
Navier-Stokes equations with revised Maxwell law. By applying the uniform
estimation of the error system, we prove that the solutions of the full
compressible Navier-Stokes equations with time relaxation converge to that of
the incompressible Navier-Stokes equations as the Mach number tends to zero.
Moreover, the convergence rates are also obtained.
