The invention relates to a security test system and a security test method of an intelligent power grid industrial control network. The system has the technical characteristic of comprising a transformer substation layer and a spacing layer, wherein the transformer substation layer comprises an upper control host and an analog attack host; the spacing layer comprises multiple pieces of embedded secondary equipment; a network data switch is connected between the transformer substation layer and the spacing layer; the upper control host, the analog attack host and the multiple pieces of secondary equipment are separately connected with the network data switch, used for achieving data communication between the transformer substation layer and the spacing layer; and the network data switch isalso connected with a flow monitoring host, used for monitoring the flow of the industrial control network in a bypass manner. The system and the method provided by the invention accords with an IEC 61850 communication specification, and simulates the secondary equipment in an intelligent power grid via the embedded equipment, and simulates a transformer substation control host in the intelligentpower grid via a PC host, so that the rate analysis and test on the IEC 61850 industrial control network security problem can be achieved.