The present invention discloses a processing method supporting handover, and communication apparatus, which can reduce an impact on an existing network. The method includes: A handover service function entity receives an identifier of a first AP from an MS, where the first AP is discovered in a WiFi network, and determines, according to the identifier of the first AP, an authenticator entity corresponding to the first AP corresponding to the identifier; establishes a connection with the MS; receives from the MS a probe request message for probing an AP to be associated; and returns to the MS a probe request response message that carries an identifier of an AP to be associated with the MS, so that the MS associates with the AP corresponding to the identifier of the AP to be associated, and accesses the WiFi network through the AP to be associated and the authenticator entity.