  The temperature dependent energy, mass and some of thermodynamic quantities
of charmonium and bottomonium have been calculated by solving the radial
Schr{\"{o}}dinger equation with the extended Cornell potential at finite
temperature using the Nikiforov-Uvarov method. Obtained results accord with
experimental data and theoretical results of the previous studies. We have
found the spectrum of quarkonia mass strictly decreases at high values of
temperature.
