The invention discloses a topology management method of an Ethernet multi-loop network, comprising the following steps: periodically sending a message of topology discovery frame (TF) by a node, which is arranged on the Ethernet multi-loop network and is provided with a blocked port, via an intact port of the node along a transmission control channel, then updating a topological database of the node, which is arranged on the Ethernet multi-loop network and receives the TF message, according to a node identification list (NODE-LIST) within the TF message, and then writing the node identification (NODE-ID) of the node of which the topological database is updated into the NODE-LIST of the TF message and forwarding the TF message along the transmission control channel. The invention further discloses a topology management system of Ethernet multi-loop network. The topology management method and the system of the Ethernet multi-loop network provided by the invention have the advantages that the topology management of the Ethernet multi-loop network is carried out, information, such as the node positions, the topological conditions, the path accessibilities and the like, within the whole Ethernet multi-loop network can be discovered.