The invention discloses a method and system for analyzing the influences of electric power communication faults on services and belongs to the field of electric power communication. The system comprises a power grid service resource database and a database of association rules for alarm giving objects and transmission channels, a real-time acquisition module, a preprocessing module and a real-time analysis module. The preprocessing module is used for performing normalization processing on alarm information of a communication network acquired by the real-time acquisition module, matching the alarm information with the transmission channels and classifying the alarm information according to the transmission channels. The real-time analysis module is used for performing correlation analysis on the alarm information matched with the transmission channels, finding out source alarms, determining the degrees of the influences of the source alarm information on the transmission channels and then determining the influences of the alarms on power grid services. Through the method and system, the accuracy of the analysis result can be improved, and the degrees of the influences of fault events on power grid services can be analyzed in a more detailed mode.