In this paper, a study on the properties of colour renter in phosphate glasses and polynary fluorophasphate glasses, which contain alkali and alkaline earth metal elements,using ESR method is presented. The experimental results show that there are two types of colour center in such two kinds of glasses, after irradiation with ?-ray. One is the trapped electron type, other is the hole type. Their g values are from 2.123 to 2.004. Hyperfine interaction of colour centers with phosphate nucleus (P31) has been observed. Analysis shows that the covalent bond in phosphate glasses； is stronger than that in fluorophosphate glasses. According to the orbital hybridization theory, the bond angles at the site of the defect in phosphate glasses are calculated.