With the widely using of smart meters, it is necessary to evaluate working status of the smart meter reasonably for proper maintenance. Taken product properties and operating characteristics of the smart meter into consideration, assessment system of smart meter working status was established which combines operation reliability, running performance, grid operating environment and outside running environment. Weights of assessment indexes were determined by means of entropy weight method. Normal cloud model was applied to solve the quantitative issue of evaluation indexes. Case analysis shows that: cloud memberships of every index of different working status can be calculated as well as the final membership. It is essential to arrange inspection strategy for each work status and eliminate running hidden troubles immediately.
