The invention discloses a method for determining the expected service life of an intelligent electric meter. The method comprises the steps of obtaining test data of accelerated degradation of the intelligent ammeter, determining that the service life of the intelligent electric meter conforms to Weibull distribution; according to the performance degradation sensitive parameter and a preset failure threshold value, obtaining a performance degradation sensitive parameter; obtaining a pseudo life estimation value of the intelligent electric meter under each stress level of multiple stress levels; obtaining a pseudo life estimation value of the intelligent electric meter under each stress level; establishing a multi-stress accelerated degradation model of temperature, humidity and current; and inputting the pseudo life estimation value into an accelerated degradation model to obtain a life estimation value of the intelligent electric meter under a normal stress level, and correcting the life estimation value by using a probability graph method based on Weibull distribution to obtain the expected life of the intelligent electric meter under the normal stress level. The problem that inthe prior art, a method for determining the expected service life of the intelligent electric meter is complex or low in reliability is solved.