  We study the critical exponents in the universal scaling laws of a
holographic non-equilibrium steady state nearby its critical point of phase
transition, which is driven by an AC electric field sitting in the boundary of
the bulk. The applied electric filed drives the initial superconducting state
into a non-equilibrium steady state with vanishing condensate as its amplitude
is greater than a critical value. In the vicinity of the non-equilibrium
critical point, we numerically calculate the six static and one dynamical
critical exponents, and find that they have similar values to those in
equilibrium systems within numerical errors.
