A method for detecting and processing a network anomaly, the method comprising: periodically performing, by a base station, a statistics on performance index information of an access link; determining, by the base station, a status of the link according to the statistical performance index information and a threshold range corresponding to the performance index information, wherein the threshold range comprises a normal threshold range, and an abnormal threshold range, and the abnormal threshold range comprises an observing period threshold range and an exceptional threshold range, when a value corresponding to the performance index information falls into a corresponding threshold range, the status of the link is the status of the corresponding threshold range, wherein when a value corresponding to the performance index information falls into a normal threshold range, the link is in a normal status, when a value corresponding to the performance index information falls into an observing period threshold range, the link is in an observing status, when a value corresponding to the performance index information falls into an exceptional threshold range, the link is in an exceptional status; and processing, by the base station, the link according to the determined status of the link; wherein processing the link comprises: for a link being in the normal status, continuously performing, by the base station, the statistics on the performance index information of the corresponding link; for a link being in the observing status, restricting, by the base station, a resource used by the link and continuously performing, by the base station, the statistics on the performance index information of the corresponding link; for a link being in the exceptional status, triggering, by the base station, the link to be re-accessed to the base station or to be released. periodically performing, by a base station, a statistics on performance index information of an access link; determining, by the base station, a status of the link according to the statistical performance index information and a threshold range corresponding to the performance index information, wherein the threshold range comprises a normal threshold range, and an abnormal threshold range, and the abnormal threshold range comprises an observing period threshold range and an exceptional threshold range, when a value corresponding to the performance index information falls into a corresponding threshold range, the status of the link is the status of the corresponding threshold range, wherein when a value corresponding to the performance index information falls into a normal threshold range, the link is in a normal status, when a value corresponding to the performance index information falls into an observing period threshold range, the link is in an observing status, when a value corresponding to the performance index information falls into an exceptional threshold range, the link is in an exceptional status; and processing, by the base station, the link according to the determined status of the link; wherein processing the link comprises: for a link being in the normal status, continuously performing, by the base station, the statistics on the performance index information of the corresponding link; for a link being in the observing status, restricting, by the base station, a resource used by the link and continuously performing, by the base station, the statistics on the performance index information of the corresponding link; for a link being in the exceptional status, triggering, by the base station, the link to be re-accessed to the base station or to be released. for a link being in the normal status, continuously performing, by the base station, the statistics on the performance index information of the corresponding link; for a link being in the observing status, restricting, by the base station, a resource used by the link and continuously performing, by the base station, the statistics on the performance index information of the corresponding link; for a link being in the exceptional status, triggering, by the base station, the link to be re-accessed to the base station or to be released.