A method for adjusting a signal delivery bandwidth, comprising: receiving, by a media gateway, MG, a command request carrying signal delivery bandwidth adjusting information, wherein the signal is adopted by a media gateway controller to instruct the MG to perform a resource operation, wherein the signal delivery bandwidth adjusting information further comprises: a ratio of a speed, which the signal is requested to be adjusted to, to a normal speed; and further comprises a signal identifier using for identifying the signal that needs to be adjusted, or a signal list identifier using for identifying a signal list that needs to be adjusted; and adjusting, by the MG, delivery bandwidth of the signal to be adjusted according to the signal delivery bandwidth adjusting information; wherein the adjusting, by the MG, delivery bandwidth of the signal according to the signal delivery bandwidth adjusting information comprises: adjusting, by the MG, delivery bandwidth of the signal corresponding to the signal identifier or the signal list identifier, according to the ratio of the speed, which the signal is requested to be adjusted to, to the normal speed; wherein the adjusting, by the MG, delivery bandwidth of the signal according to the signal delivery bandwidth adjusting information comprises: determining whether a signal identifier and/or signal list identifier in the signal delivery bandwidth adjusting information matches with a signal and/or signal list on a corresponding termination or stream; adjusting delivery bandwidth of the signal according to the signal delivery bandwidth adjusting information, if the determining result is Yes; and returning error response information, if the determining result is No. receiving, by a media gateway, MG, a command request carrying signal delivery bandwidth adjusting information, wherein the signal is adopted by a media gateway controller to instruct the MG to perform a resource operation, wherein the signal delivery bandwidth adjusting information further comprises: a ratio of a speed, which the signal is requested to be adjusted to, to a normal speed; and further comprises a signal identifier using for identifying the signal that needs to be adjusted, or a signal list identifier using for identifying a signal list that needs to be adjusted; and adjusting, by the MG, delivery bandwidth of the signal to be adjusted according to the signal delivery bandwidth adjusting information; wherein the adjusting, by the MG, delivery bandwidth of the signal according to the signal delivery bandwidth adjusting information comprises: adjusting, by the MG, delivery bandwidth of the signal corresponding to the signal identifier or the signal list identifier, according to the ratio of the speed, which the signal is requested to be adjusted to, to the normal speed; wherein the adjusting, by the MG, delivery bandwidth of the signal according to the signal delivery bandwidth adjusting information comprises: determining whether a signal identifier and/or signal list identifier in the signal delivery bandwidth adjusting information matches with a signal and/or signal list on a corresponding termination or stream; adjusting delivery bandwidth of the signal according to the signal delivery bandwidth adjusting information, if the determining result is Yes; and returning error response information, if the determining result is No. determining whether a signal identifier and/or signal list identifier in the signal delivery bandwidth adjusting information matches with a signal and/or signal list on a corresponding termination or stream; adjusting delivery bandwidth of the signal according to the signal delivery bandwidth adjusting information, if the determining result is Yes; and returning error response information, if the determining result is No.