Two series of Nd-doped glasses Li2OBaOXP2O5 and 45RmO55P2O5 where R is alkali or alkaline earth element, were prepared, and their absorption and fluorescence spectra were measured. Based on the Judd-Ofelt theoretical model, the effects of various oxides on the fluorescence properties of Nd-doped phosphate glasses were studied. It was shown that the spontaneous radiative transition probability of Nd3+ increases with the decreasing of field strength of cations.