The models to describe the proton mobility (μH) together with the glass transition temperature (Tg) of proton conducting phosphate glasses employing the glass composition as descriptors have been developed using a statical analysis approach. According to the models, the effects of additional HO1/2, MgO, BaO, LaO3/2, WO3, NbO5/2, BO3/2 and GeO2 as alternative to PO5/2 were found as following. μH at Tg is determined first by concentrations of HO1/2 and PO5/2, and μH at Tg increases with increasing HO1/2 concentration and decreasing PO5/2. The component oxides are categorized into three groups according to the effects on μH at Tg and Tg. The group 1 oxides increase μH at Tg and decrease Tg, and HO1/2, MgO, BaO and LaO3/2 and BO3/2 are involved in this group. The group 2 oxides increase both μH at Tg and Tg, and WO3 and GeO2 are involved in this group. The group 3 oxides increase Tg but do not vary μH at Tg. Only NbO5/2 falls into the group 3 among the oxides examined in this study. The origin of the effect of respective oxide groups on μH at Tg and Tg were discussed.