In this paper, the laser-selective excited time-resolved spectroscopy technique is used to investigate the concentration quenching and energy diffusion and transfer between Nd3+ ions in the phosphate glasses, in which the composition and the Nd3+ concentration are similar to those of Nd x Y1-x P5O14 crystal. The experimental result shown that this material is with weak concentration quenching, and the quenching rate proportional to X. The laser-selective excited timo-resolvod spectra shows that Nd ions located in various different local crystal-field sites In NP-1 glass with N0=4.2×1021 cm-1. The energy transfer and diffusion between Nd3+ Ions take place through forced electric dipole-dipole interaction. In tomporature range of 77~150 K, tho transfer process invovings a thermal activation onorgy of 330cm-1 was found. By fitting experimental data with theory, several energy transfer parameters are estimatod.