The formation of the NaH molecule from unaligned ultracold atoms via photoassociation (PA) is theoretically investigated by numerically solving the time-dependent Schr(o)dinger equation including the vibrational and rotational degrees of freedom.The PA processes via one- and two-photon excitations are described.The calculated results show that the associated molecule can be prepared to a desired rovibrational state of the ground electronic state for Nail.Compared with the one-photon association probability,the two-photon association probability is obviously enhanced.