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We study the evolution of cluster formation on ultrafast laser induced ablation of Gold nanoparticle by means of Molecular Dynamics simulation. The energy given to the system are in two regime, the lower energy is able to ablate and the higher energy evaporate the nanoparticle into finer cluster. The case for lower energy, the system formed a shell structure with smaller clusters reside within, while for higher energy the system are evaporated and dominated with monomers and small clusters around. The evaporated case shows a compressive pressure all over the simulation time while for lower energy case, tensile pressure are responsible for the fraction of the nanoparticle. Small angle scattering analysis performed at the end of simulation indicated the distribution of cluster sizes are linearly correspond to the cluster size analysis obtained by following trajectories of each atom from Molecular Dynamics scheme.