A measurement scoring software is developed to identify and justify telemetric data based on the correlation analysis of the telemetric data from power plants and substations. It evaluates data from a substation with 17 indexes， i.e. operation state of RTU in each substation， unbalanced active power of bus， unbalanced reactive power of bus， unbalanced active power of AC line segment， unbalanced reactive power of AC line segment， unbalanced current flow of AC line segment， unbalanced active power of transformer， unbalanced reactive power of transformer， unmatched active power， reactive power and current flow of bay， rationality of bus voltage， suspect state of breaker and switch， shunt-wound buses only with switch， rationality of transformer tap-changer， suspect data， suspect state of ground switch， deserted effective telemetric data， conflicted telemetric data respectively. The scoring system can give clues to those data not satisfied with the basic operational rules of power network and provide foundations for the corresponding fault disposal to improve the accuracy of the actual data of energy management system.