Network topology determination method, device and system

The invention discloses a network topology determination method and device, and belongs to the technical field of communication. The device comprises an acquisition module used for acquiring a connection relationship among a plurality of network elements used for forming a network and a network level of each network element, and the network level is used for reflecting the importance degree of thenetwork elements in the network; a first determination module which is used for determining a plurality of sub-networks based on the connection relationship among the plurality of network elements and the network level of each network element; a second determination module which is used for determining the position information of each network element based on the connection relationship between the network elements in each sub-network according to the network levels of the network elements in the network from high to low; and an establishment module which is used for establishing a network topology based on the conne