The disclosure relates to a wireless access control method, a wireless access control device, a wireless access control router and a wireless access control terminal. The method comprises the steps as follows: determining first signal strength of a related terminal; judging whether the first signal strength is lower than a preset signal strength threshold value; reducing the power for transmitting a management message while judging that the first signal strength is lower than the preset signal strength threshold value so that the terminal could be dissociated from AP while detecting that the second signal strength of the related AP is lower than a roam threshold value. By using the embodiment of the disclosure, the terminal could be dissociated from the AP with relative weak signal strength without manual manipulation of a user and related to the AP with better signal strength in a wireless local area network, thereby improving online experience of the user and ensuring the performance of the whole network.