The invention provides a method for locating out-of-tolerance electric-energy meters in operation. The method includes: 1. acquiring line loss electric quantity of a specific stage area at each day for a period of time and power consumption of each user at each day under the stage area; 2. according to a Pearson correlation coefficient calculation formula (as is described in the specification), using the acquired line loss electric quantity of the state area at each day as X and the power consumption of each user at each day or power consumption after combination of users as Y, the number of acquired samples as n, calculating the Pearson correlation coefficient of the power consumption of each user at each day and the line loss electric quantity of the stage area at each day, or calculating the Pearson correlation coefficient of the power consumption after combination of the different users and the line loss electric quantity of the state area; 3. comparing the correlation coefficient of the power consumption of each user and the line loss electric quantity of the stage area or the coefficient of the power consumption after the combination of the users and the line loss electric quantity of the stage area so that user electric-energy meters with correlation coefficient >=0.8 is suspicious electric-energy meters; 4. locating rapidly the suspicious out-of-tolerance electric-energy meters according to the above-mentioned steps.