  Inspired in the AdS/CFT correspondence, a variety of holographic
phenomenological models have been proposed in the last years to describe
non-perturbative aspects of strong interactions. These models are denominated
as AdS/QCD. In this work we review the use of the AdS/QCD soft-wall model to
investigate the spectrum of scalar glueballs at finite temperature. The scalar
glueball states are identified as the poles of the retarded correlation
function of the glueball operator. In the gauge/gravity duality, these poles
are determined by the quasinormal spectrum of a massless scalar field
propagating in the bulk geometry that consists on an ${AdS}_{5}$ black hole
with a background dilaton field. We discuss some results for masses and decay
widths of scalar glueballs in the plasma phase and analyse how these quantities
evolve with temperature and momentum.
