A method of dynamic frequency selection includes receiving setting information of a WI-FI unit input by an input unit, controlling the WI-FI unit in a STA working mode to switch different channels to scan an available access point AP with dynamic frequency selection within one channel when receiving the setting information of setting the WI-FI unit to work in an AP working mode and the STA working mode simultaneously, controlling the WI-FI unit in the AP working mode to switch to the channel within which the WI-FI unit in the STA working mode scans the available access point AP when the WI-FI unit in the STA working mode scans the available access point AP, and controlling the WI-FI unit in the AP working mode to communicate with a terminal device via the switched access point AP.