  Based on the Dyson-Schwinger Equations (DSEs) with zero- and finite
temperature, the two quark condensate, the four quark condensate and quark
gluon mixed condensate in non-perturbative QCD state are investigated by
solving the DSEs respectively at zero and finite temperature. These condensates
are important input parameters in QCD sum rule with zero and finite temperature
and properties of hadronic study. The calculated results manifest that the
three condensates are almost independent of the temperature below the critical
point temperature $T_{c}$. The results also show that the chiral symmetry
restoration is obtained above $T_{c}$. At the same time, we also calculate the
ratio of the quark gluon mixed condensate to the two quark condensate which
could be quark virtuality. The calculations show that the ratio $m^{2}_{0}(T)$
is almost flat in the region of temperature from $0$ to $T_{c}$, although there
are drastic changes of the quark condensate and the quark gluon mixed
condensate at this region of $T_{c}$.The predicted ratio comes out to be
$m^{2}_{0}(T)= 2.41GeV^{2}$ for vacuum state at the Chiral limit, which
suggests the significance that the quark gluon mixed condensate has played in
OPE.
