In this paper, we analyse two kinds of theoretical models. Based on the study of electron transfer process in photostimulated luminescence, a new model, parallel model, is proposed. In terms of this model, the general expression of photostimulated luminescence process is gained. A kind of photostimulated luminescence material, BaFCl:Eu2+, is fired and a series of spectra are measured. To test this model we compared the theoretical and experimental results in terms of decay process, as well as the difference between two kinds of color centers and the relationship between irradiation dose and luminescent intensity.