A method for identifying interference, applied to a wireless communications network that comprises a wireless management device and at least two access point devices, wherein the method for identifying interference comprises: requesting, by the wireless management device, the at least two access point devices to separately collect spectrum information of an interference source, by sending a spectrum scan request message, which includes a scan start timestamp; receiving, by the wireless management device, from each of the at least two access point devices, collected spectrum information of an interference source, and determining that the spectrum information collected by the at least two access point devices comprises spectrum information of interference sources that belong to a same device type; separately extracting, by the wireless management device, from the spectrum information collected by the at least two access point devices, the spectrum information of the interference sources that belong to the same device type; matching, by the wireless management device, characteristic sequences that are in a same time period and in the separately extracted spectrum information of the interference sources that belong to the same device type, and calculating an overlapping characteristic match value of the characteristic sequences in the same time period; and determining, by the wireless management device, whether the overlapping characteristic match value is greater than a preset threshold, and if the overlapping characteristic match value is greater than the preset threshold, determining that the separately extracted spectrum information of the interference sources that belong to the same device type is from a same interference source, and if the overlapping characteristic match value is not greater than the preset threshold, determining that the separately extracted spectrum information of the interference sources that belong to the same device type is from different interference sources. requesting, by the wireless management device, the at least two access point devices to separately collect spectrum information of an interference source, by sending a spectrum scan request message, which includes a scan start timestamp; receiving, by the wireless management device, from each of the at least two access point devices, collected spectrum information of an interference source, and determining that the spectrum information collected by the at least two access point devices comprises spectrum information of interference sources that belong to a same device type; separately extracting, by the wireless management device, from the spectrum information collected by the at least two access point devices, the spectrum information of the interference sources that belong to the same device type; matching, by the wireless management device, characteristic sequences that are in a same time period and in the separately extracted spectrum information of the interference sources that belong to the same device type, and calculating an overlapping characteristic match value of the characteristic sequences in the same time period; and determining, by the wireless management device, whether the overlapping characteristic match value is greater than a preset threshold, and if the overlapping characteristic match value is greater than the preset threshold, determining that the separately extracted spectrum information of the interference sources that belong to the same device type is from a same interference source, and if the overlapping characteristic match value is not greater than the preset threshold, determining that the separately extracted spectrum information of the interference sources that belong to the same device type is from different interference sources.