  We provide an analytical derivation of the confinement deconfinement phase
transition to QCD in the pure gluon sector at finite temperature within the
framework of S U(3) dual QCD formulation. The mechanism of color confinement
has been explained by adopting magnetic symmetry to extract magnetic monopoles
in a gauge invariant way and produce magnetic condensation of S U(3) dual QCD
vacuum which guarantees the dual Meissner effect. The deconfinement phase
transition has been described by constructing the effective potential at finite
temperature in the imaginary time formalism. The magnetic monopole condensate
acts as an order parameter for both the confinement deconfinement phase and has
been observed to be associated with the appearance/disappearance of magnetic
monopole condensate. The evidence of the confinement deconfinement phase
transition is further confirmed by the appearance/disappearance of the dual
Meissner effect and the existence/breaking of flux tube with temperature. The
gauge-invariant vector and scalar glueball masses at finite temperature have
been obtained from the minimization of the effective potential at finite
temperature which seems to demonstrate a first order deconfinement phase
transition associated with the restoration of magnetic symmetry.
