A method for sending a scan report based on a multi-carrier system, comprising: a terminal acquiring a first configuration parameter of multiple carriers indicated by a base station and a second configuration parameter needed for the terminal to send a scan report, wherein the multiple carriers indicated by the base station are a plurality of carriers of the base station and/or a neighboring base station of the base station and are multiple fully-configured carriers, and the terminal acquiring the first configuration parameter of the multiple carriers indicated by the base station and the second configuration parameter needed for the terminal to send the scan report comprises: the terminal sending a scan request to the base station and receiving a scan response, which carries the first configuration parameter and the second configuration parameter, from the base station, wherein the first configuration parameter comprises at least one of the following: multiple identifications of the multiple carriers indicated by the base station, multiple frequencies of the multiple carriers indicated by the base station, and multiple bandwidths of the multiple carriers indicated by the base station; and the terminal scanning the multiple carriers indicated by the base station according to the first configuration parameter, generating a scan report, and sending the scan report to the base station according to the second configuration parameter, wherein the scan report comprises information of multiple carriers scanned by the terminal, wherein the information comprises at least one of the following: the number of the multiple scanned carriers, multiple identifications of the multiple scanned carriers, multiple frequencies of the multiple scanned carriers, and multiple bandwidths of the multiple scanned carriers. a terminal acquiring a first configuration parameter of multiple carriers indicated by a base station and a second configuration parameter needed for the terminal to send a scan report, wherein the multiple carriers indicated by the base station are a plurality of carriers of the base station and/or a neighboring base station of the base station and are multiple fully-configured carriers, and the terminal acquiring the first configuration parameter of the multiple carriers indicated by the base station and the second configuration parameter needed for the terminal to send the scan report comprises: the terminal sending a scan request to the base station and receiving a scan response, which carries the first configuration parameter and the second configuration parameter, from the base station, wherein the first configuration parameter comprises at least one of the following: multiple identifications of the multiple carriers indicated by the base station, multiple frequencies of the multiple carriers indicated by the base station, and multiple bandwidths of the multiple carriers indicated by the base station; and the terminal scanning the multiple carriers indicated by the base station according to the first configuration parameter, generating a scan report, and sending the scan report to the base station according to the second configuration parameter, wherein the scan report comprises information of multiple carriers scanned by the terminal, wherein the information comprises at least one of the following: the number of the multiple scanned carriers, multiple identifications of the multiple scanned carriers, multiple frequencies of the multiple scanned carriers, and multiple bandwidths of the multiple scanned carriers.