The invention discloses a method for automatically classifying service requirements based on common feature groups. The method comprises the following steps: A, acquiring the external service requirement data of an external service system and the service response data that can be provided for the external service system by a power consumption information acquisition system; B, analyzing the external service requirement data and the service response data, and obtaining the feature elements of the external service requirement and a relation between the feature elements and the external businessrequirement; C, dividing the external business requirement, according to the similarity of the feature elements corresponding to the external business requirement, a plurality of common feature groups; and D, based on the feature elements in the common feature groups, setting the service response of the power consumption information acquisition system to the common feature groups and generating acommon feature group-service response matrix. The method can provide a reference basis for the abstract data service definition and the data service efficient cooperation of the power consumption information acquisition system, so that the power consumption information acquisition system and an external interaction system can achieve efficient data sharing.