This paper reports the spectroscopic properties of Er３＋-doped Al(PO ３)3-based fluorophosphate glasses for 1.5μm optical ampl ifiers. Effects of alkaline/alkaline-earth metal composition on the spectroscopi c properties of Er３＋ in fluorophosphate glasses are investigated. A strong correlation between the alkaline/alkaline-earth metal content and the s pectroscopic parameters, such as absorption and emission cross sections, Judd-Of elt intensity parameters and upconversion emission intensity, has been observed. The fluorophosphate glass with 12 mol% potassium fluoride exhibits the largest calculated stimulated-emission cross-section of 7.83×10-21cm２ and the smallest upconversion emission intensity among the fluorophosphate studied. The fluorophosphate glass with 23 mol% strontium fluoride has a broadb and near-infrared emission at 1.5μm with a full width at half-maximum over 65nm and a long upper level fluorescence lifetime of 8.6ms.