A routing device for realizing dynamic sleep and wakeup, wherein the routing device comprises: a master control module and a reception processing module, the master control module is configured to select to enter into a sleep mode or a quasi-power-off mode according to an actual user access and traffic situation by: when the routing device remains in an inactivity state for a preset first detection time T1, selecting to enter into a sleep mode, wherein when there is no user access, or there is user access but there is no traffic, the routing device is determined in the inactivity state; when the routing device remains in the sleep mode for a preset second detection time T2, selecting to enter into a quasi-power-off mode; power on the reception processing module in a case that the routing device is in the sleep mode or the quasi-power-off mode; when a user requests to access the routing device which has entered into the sleep mode or the quasi-power-off mode, receive an automatic wake-up/power-on command sent by a network card device; after the reception processing module receives the automatic wake-up/power-on command, wake up the routing device from the sleep mode to return to the normal mode, or power on and recover the routing device from the quasi-power-off mode to return to the normal mode; the reception processing module is configured to receive the automatic wake-up/power-on command transmitted by a transmission module of a network card device after powered on by the master control module; in the sleep mode, a firmware body of the routing device is still running, the routing device monitors a channel in order to maintain a mobile network attachment and updates, and the reception processing module of the routing device is running; in the quasi-power-off mode, the routing device doesn't keep the firmware body running, doesn't maintain the mobile network attachment and updates, and doesn't monitor the channel, the reception processing module monitors wireless signals transmitted by the transmission module of the network card device. the routing device comprises: a master control module and a reception processing module, the master control module is configured to select to enter into a sleep mode or a quasi-power-off mode according to an actual user access and traffic situation by: when the routing device remains in an inactivity state for a preset first detection time T1, selecting to enter into a sleep mode, wherein when there is no user access, or there is user access but there is no traffic, the routing device is determined in the inactivity state; when the routing device remains in the sleep mode for a preset second detection time T2, selecting to enter into a quasi-power-off mode; power on the reception processing module in a case that the routing device is in the sleep mode or the quasi-power-off mode; when a user requests to access the routing device which has entered into the sleep mode or the quasi-power-off mode, receive an automatic wake-up/power-on command sent by a network card device; after the reception processing module receives the automatic wake-up/power-on command, wake up the routing device from the sleep mode to return to the normal mode, or power on and recover the routing device from the quasi-power-off mode to return to the normal mode; the reception processing module is configured to receive the automatic wake-up/power-on command transmitted by a transmission module of a network card device after powered on by the master control module; in the sleep mode, a firmware body of the routing device is still running, the routing device monitors a channel in order to maintain a mobile network attachment and updates, and the reception processing module of the routing device is running; in the quasi-power-off mode, the routing device doesn't keep the firmware body running, doesn't maintain the mobile network attachment and updates, and doesn't monitor the channel, the reception processing module monitors wireless signals transmitted by the transmission module of the network card device.