The invention provides an analysis method for automatically monitoring abnormal signals of a power grid. The analysis method comprises the following steps of S10, receiving an abnormal signal group ofa power distribution station uploaded in real time; S11, standardizing each signal in the abnormal signal group, and querying in a pre-established standardized library to obtain a standardized name corresponding to each signal to form a current signal group; S12, matching whether an associated power grid abnormal event exists in a pre-formed power grid event library or not; outputting the power grid abnormal event analysis corresponding to the current signal group or/and the paraphrase analysis corresponding to each standardized name in the current signal group; and S13, displaying the outputresult on a display interface. The invention further provides a corresponding system. By implementing the method and the system, the abnormal signals of the power grid can be automatically monitoredand analyzed, the signal leakage can be prevented, and the comprehensiveness and accuracy of analysis are improved.