The invention relates to an energy consumption analyzing method of user electricity data, and belongs to the analysis field of system data. The energy consumption analyzing method includes the steps of data integrating, energy consumption data analyzing and mass data processing. Energy consumption analysis is integrally designed, multidirectional and multi-scenario energy consumption analyzing features are expressed in the design, energy consumption statistic analysis, energy efficiency index rating, energy efficiency diagnosis, energy efficiency measurement benefit tracking management and exception monitoring are integrally centralized in the energy consumption analysis; mass data processing is optimized, and a middle result set and a level granularity processing method are utilized to efficiently process data. The data are processed according to time granularity grading, statistical calculation is performed from a low level to a high level according to calculated size of sub granularity, and efficient calculation from spot to surface is formed. In order to avoid a large amount of repeated calculation, the data set is classified, central data are stored into a temporary table, and utilization rate of the data is greatly improved.