The invention discloses a networked automatic stand-by power switching device and an information processing and testing method of the networked automatic stand-by power switching device. The networked automatic stand-by power switching device comprises a digital transformer substation network, a data switching exchange connected to the digital transformer substation network and an automatic stand-by power switching device body. The automatic stand-by power switching device body comprises an input end and an output end. The input end is connected with the data switching exchange. The output end is connected with the data switching exchange through a GOOSE. The data switching exchange is further connected with an actuating unit which controls the switch to carry out kickdown according to GOOSE information output by the automatic stand-by power switching device body. Through information processing and testing of the networked automatic stand-by power switching device, judging information uploaded by a measuring and control device can be identified and on-spot debugging loads are reduced. Double network cards can ensure reliability and real-time performance of data communication and the problem of testing the networked automatic stand-by power switching device is solved.