The invention provides a real-time online correction method and equipment for an electricity consumption information acquisition system. The method for realizing electricity data correction aiming atthe electricity consumption information acquisition system comprises the following steps: performing electricity data acquisition at a server end according to a preset acquisition time interval, judging whether the current electricity data is accurate, if so, performing accurate electricity data storage, judging whether a secondary correction principle is met, if so, performing secondary correction on primary correction data based on a least square method, and updating the storage according to the secondary correction result; otherwise reading a daily electric energy data sequence, and performing primary correction and storage based on improved extrapolation on the wrong data. The electricity data is requested and transmitted by taking a low voltage power line as a communication channel, an electricity data correction technical scheme based on the improved extrapolation and secondary correction is proposed for the first time, and the aim of improving the electricity data acquisition integrity and data quality of the electricity consumption information acquisition system is achieved.