  In this paper, we consider the nonisentropic ideal polytropic Navier-Stokes
equations to the Cauchy problem. The asymptotic stability of contact
discontinuity is established under the condition that the initial perturbations
are partly small but the strength of contact discontinuity can be suitably
large. With this conditions, the bounds of density and temperature can be
obtained from the complicated structure of Navier-Stokes equations. The proofs
are given by the elementary energy method.
