A method for network self-organization, comprising: performing, by a first node, a signal measurement on a plurality of transmission nodes, and determining the transmission node whose measurement result is higher than a preset threshold as at least one candidate transmission node, wherein the measurement result is a measurement result of a reference signal receiving power, RSRP, and/or a reference signal receiving quality, RSRQ; determining, by the first node, a second node among the at least one candidate transmission node according to a preset condition, wherein the second node is a transmission node with a highest level among the at least one candidate transmission node, wherein the first node receives a broadcast comprising level information from the at least one candidate transmission node and wherein a higher level of the transmission node indicates fewer hops between the transmission node and an anchor node; and establishing, by the first node, a connection with the second node, wherein the method further comprises: receiving, by the first node, second configuration information sent by the second node, wherein the second configuration information is used to instruct the first node to establish a connection with at least one other transmission node that has the same level as the second node based on a Uu interface; and establishing, by the first node, the connection with the at least one other transmission node that has the same level as the second node based on the Uu interface; and wherein the method further comprises: disconnecting or maintaining, by the first node, an established connection with said other transmission node. performing, by a first node, a signal measurement on a plurality of transmission nodes, and determining the transmission node whose measurement result is higher than a preset threshold as at least one candidate transmission node, wherein the measurement result is a measurement result of a reference signal receiving power, RSRP, and/or a reference signal receiving quality, RSRQ; determining, by the first node, a second node among the at least one candidate transmission node according to a preset condition, wherein the second node is a transmission node with a highest level among the at least one candidate transmission node, wherein the first node receives a broadcast comprising level information from the at least one candidate transmission node and wherein a higher level of the transmission node indicates fewer hops between the transmission node and an anchor node; and establishing, by the first node, a connection with the second node, wherein the method further comprises: receiving, by the first node, second configuration information sent by the second node, wherein the second configuration information is used to instruct the first node to establish a connection with at least one other transmission node that has the same level as the second node based on a Uu interface; and establishing, by the first node, the connection with the at least one other transmission node that has the same level as the second node based on the Uu interface; and receiving, by the first node, second configuration information sent by the second node, wherein the second configuration information is used to instruct the first node to establish a connection with at least one other transmission node that has the same level as the second node based on a Uu interface; and establishing, by the first node, the connection with the at least one other transmission node that has the same level as the second node based on the Uu interface; and wherein the method further comprises: disconnecting or maintaining, by the first node, an established connection with said other transmission node.