A virtualization mapping method for a physical optical network, comprising: selecting, from physical nodes of the physical optical network, N target physical nodes to which virtual nodes of a virtual link are to be mapped, according to node mapping weights between the virtual nodes of the virtual link and the physical nodes, where N is a positive integer; selecting a first physical link from target physical links constituted by the N target physical nodes, according to link mapping weights between the virtual link and physical links, when determining that all virtual nodes of the virtual link can be successfully mapped to the target physical nodes; and mapping the virtual link to the first physical link, wherein, for each of the virtual nodes of the virtual link, the node mapping weight between the virtual node and a target physical node is determined according to switching capacity resources requested by the virtual node from the target physical node, remaining switching capacity resources of the target physical node, remaining affordable service amount of the target physical node, and switching resources requested by the virtual node; and wherein the link mapping weight between the virtual link and a target physical link is determined according to band width resources requested by the virtual link from the target physical link, remaining band width resources of the target physical link, switching capacity resources requested by each of the virtual nodes from the target physical nodes in the target physical link, remaining switching capacity resources of each of the target physical nodes in the target physical link, and remaining affordable service amount of each of the target physical nodes in the target physical link, wherein the determining that all virtual nodes of the virtual link can be successfully mapped to the target physical nodes comprises: determining that each of the virtual nodes of the virtual link can be successfully mapped to the target physical node according to a preset mapping limitation; wherein the mapping limitation comprises switching capacity resources requested by each of the virtual nodes being not greater than remaining switching capacity resources of each of the target physical nodes. selecting, from physical nodes of the physical optical network, N target physical nodes to which virtual nodes of a virtual link are to be mapped, according to node mapping weights between the virtual nodes of the virtual link and the physical nodes, where N is a positive integer; selecting a first physical link from target physical links constituted by the N target physical nodes, according to link mapping weights between the virtual link and physical links, when determining that all virtual nodes of the virtual link can be successfully mapped to the target physical nodes; and mapping the virtual link to the first physical link, wherein, for each of the virtual nodes of the virtual link, the node mapping weight between the virtual node and a target physical node is determined according to switching capacity resources requested by the virtual node from the target physical node, remaining switching capacity resources of the target physical node, remaining affordable service amount of the target physical node, and switching resources requested by the virtual node; and wherein the link mapping weight between the virtual link and a target physical link is determined according to band width resources requested by the virtual link from the target physical link, remaining band width resources of the target physical link, switching capacity resources requested by each of the virtual nodes from the target physical nodes in the target physical link, remaining switching capacity resources of each of the target physical nodes in the target physical link, and remaining affordable service amount of each of the target physical nodes in the target physical link, wherein the determining that all virtual nodes of the virtual link can be successfully mapped to the target physical nodes comprises: determining that each of the virtual nodes of the virtual link can be successfully mapped to the target physical node according to a preset mapping limitation; wherein the mapping limitation comprises switching capacity resources requested by each of the virtual nodes being not greater than remaining switching capacity resources of each of the target physical nodes.