the present invention provides a method as regards how a network side gets a mss into the idle mode in a wireless man , including : the pa / bs sends a dreg_cmd to the mss ; the mss sends a dreg_req message to the pa / bs , according to the dreg_cmd message , requesting to enter the idle mode ; the pa / bs releases the link of the mss and updates the data of the anchor pc / lr after receiving the dreg_req message . the present invention specifies the process of a mss entering the idle mode initiated by the network and the settings of relevant parameters , thus enhancing the stability of the process of entering the idle mode and saving the system resources .