The invention provides an insulator service life prediction method, which comprises the following steps of determining various aging characteristic quantity statistical data of an insulator, such as the hardness, mechanical property, electrical property of an umbrella skirt, etc.; performing fitting regression analysis on the aging characteristic quantity statistical data to obtain a regression equation, and further obtaining an insulator service life prediction formula. The invention further provides an insulator service life prediction device, a computer device and a computer readable storage medium. According to the present invention, the service life of the composite insulator can be simply and reliably predicted, the operation is simple, the application range is wide, and the maintenance of the stability of a power system is facilitated.