Abstract: High non-LTE issue of ionization and radiative transfer are important physical characteristics of the laser-target hohlraum. Detailed multi-group transport approximation under non-LTE atomic physics is necessary for precisely describing radiation transfer and its interaction with matter. Using the recently developed LARED-integration code, we have accomplished multi-group radiative transfer calculations of the laser-target experimental hohlraum in 2D. Numerical results reflect the radiative illumination ununiformity inside the hohlraum. The ratio of X-ray intensity of the laser spot versus other regions along the gold wall agrees well with that of the experimental result, meanwhile the measured and simulated fuel shape resembles each other closely.