  Consistent with cosmological constraints, there are scenarios with the large
lepton asymmetry which can lead to the finite baryochemical potential at the
cosmic QCD phase transition scale. In this paper, we investigate this
possibility in the holographic models. Using the holographic renormalization
method, we find the first order Hawking-Page phase transition, between
Reissner-Nordstr$\rm\ddot{o}$m AdS black hole and thermal charged AdS space,
corresponding to the de/confinement phase transition. We obtain the
gravitational wave spectra generated during the evolution of bubbles for a
range of the bubble wall velocity and examine the reliability of the scenarios
and consequent calculations by gravitational wave experiments.
