The embodiment of the invention provides an STA (Station) roaming method in an independent AP (Access Point) mode and an AP. The method comprises the following steps: receiving a re-associated message sent from an STA by a first AP; inquiring whether a roaming table item of the STA exists in a local roaming table item or not according to an MAC (Media Access Control) address of the STA in the re-associated message; if not, inquiring a locally stored equipment information table according to an OLD BSSID (Old Basic Service Set Identifier) field in the re-associated message so as to obtain a second AP corresponding to the OLD BSSID field, and sending a roaming request message to the second AP; and generating the roaming table item and an associated table item of the STA when a successful roaming confirmation message replied by the second AP is received. According to the terminal roaming method in the independent AP mode and the AP provided in the embodiment of the invention, when AC (Alternating Current) is abnormal, the AP works in the independent mode; therefore, roaming between the APs is realized; the roaming realization time is reduced; and the data connection reliability is improved.