  We consider the dynamics of the scalar and pseudoscalar glueballs in the
Quark-Gluon Plasma (QGP). By using the instanton model for the QCD vacuum we
give the arguments that the nonperturbative gluon-gluon interaction is
qualitatively different in the confinement and deconfinement phases. Based on
this observation it is shown that above $T_c$ the values of the scalar and
pseudoscalar glueball masses might be very small. The estimation of the
temperature of scale invariance restoration, at which the scalar glueball
becomes massless, is given. We also discuss the Bose-Einstein condensation of
the glueballs and the superfluidity of the glueball matter in QGP.
