The invention discloses a transformer station equipment function association database establishing method and an event association information group filtering method. The transformer station equipment function association database establishing method comprises the following steps: establishing a transformer station equipment function association model, establishing a transformer station equipment function association database template, parsing an SSD file, parsing an SCD file, and establishing an instantiated equipment function association database by using the transformer station equipment function association database template and the equipment information obtained from the SSD and SCD; and the event association information group filtering method comprises the following steps: capturing the state quantity displacement information of GOOSE network message and MMS network message, and filtering the network messages by using information association relationship determined by the station equipment function association database in order to obtain an event association information group. The transformer station equipment function association database is used to realize information filtration, all information serving for transformer station secondary equipment function analysis is rapidly extracted, and the information is displayed together with a graph for describing the function relation in order to provide direct help for rapid decision of scheduling personnel.