The laser-induced luminescance properties and the energy transfer processes of the terbium-acetylacetone-tri-n-octylphine oxide (Tb-AA-TOPO) system were studied using Nd:YAG-pumped dye laser and SIT vidicon optical multichannel analyzer, The phosphorescence emission of AA was determined first time at room temperature. The Tb-AA-TOPO-SLS system was adopted in the determination of the trace terbium.