  We develop a dynamical holographic QCD model, which resembles the
renormalization group from ultraviolet (UV) to infrared (IR). The dynamical
holographic model is constructed in the graviton-dilaton-scalar framework with
the dilaton background field $\Phi$ and scalar field $X$ responsible for the
gluodynamics and chiral dynamics, respectively. We summarize our results on
hadron spectra, QCD phase transition and transport properties including the jet
quenching parameter and the shear/bulk viscosity in the framework of the
dynamical holographic QCD model.
