Black box testing method for watt-hour meter cannot implementSbranch path traversal of theSwatt-hour meterSsoftware, and also can"t provide EEPROM data error tolerance evaluation of theSwatt-hour meter, meanwhile considering the facts that watt-hour meter data storage unit EEPROM preserved watt-hour meter"s running parameters, this paper proposesSa new type of watt-hour meter white-box testing methodSbased on EEPROM read and write .The new test method based on the reading and writing of the parameters in EEPROM, which can implement Sbranch path traversal of theSwatt-hour meter software, and avoid the branches path missing of the black box test.SAt the same time, the new test method can realize the watt-hour meter software fault tolerance evaluation.