A first network device, comprising: a transceiving module (501, 601), configured to: send configuration information to a target terminal; wherein the configuration information comprises measurement configuration information required by the target terminal for measuring a first spectrum; and the first spectrum is an unlicensed spectrum for the first network device; and receive feedback information reported by the target terminal, wherein the feedback information is obtained by the target terminal by measuring the first spectrum; the feedback information comprises time information that is used to indicate available time of the first spectrum; and a processing module (502, 602), configured to determine, according to the feedback information received by the transceiving module (501, 601), whether the first spectrum is available; wherein the configuration information further includes at least one of the following information: feedback information reporting condition information; first spectrum information that is used to indicate the first spectrum; or feedback resource indication information that is used to indicate a spectrum resource used by the target terminal for reporting the feedback information; wherein the feedback information reporting condition information is used for instructing the target terminal to report the feedback information when a condition indicated by the feedback information reporting condition information is met, and wherein a trigger condition for the sending the configuration information to the target terminal comprises: a signal strength or energy of a scanned signal is less than a preset threshold, wherein the scanned signal is scanned by the first network device on the first spectrum. a transceiving module (501, 601), configured to: send configuration information to a target terminal; wherein the configuration information comprises measurement configuration information required by the target terminal for measuring a first spectrum; and the first spectrum is an unlicensed spectrum for the first network device; and receive feedback information reported by the target terminal, wherein the feedback information is obtained by the target terminal by measuring the first spectrum; the feedback information comprises time information that is used to indicate available time of the first spectrum; and a processing module (502, 602), configured to determine, according to the feedback information received by the transceiving module (501, 601), whether the first spectrum is available; wherein the configuration information further includes at least one of the following information: feedback information reporting condition information; first spectrum information that is used to indicate the first spectrum; or feedback resource indication information that is used to indicate a spectrum resource used by the target terminal for reporting the feedback information; wherein the feedback information reporting condition information is used for instructing the target terminal to report the feedback information when a condition indicated by the feedback information reporting condition information is met, and wherein a trigger condition for the sending the configuration information to the target terminal comprises: a signal strength or energy of a scanned signal is less than a preset threshold, wherein the scanned signal is scanned by the first network device on the first spectrum. feedback information reporting condition information; first spectrum information that is used to indicate the first spectrum; or feedback resource indication information that is used to indicate a spectrum resource used by the target terminal for reporting the feedback information; wherein the feedback information reporting condition information is used for instructing the target terminal to report the feedback information when a condition indicated by the feedback information reporting condition information is met, and wherein a trigger condition for the sending the configuration information to the target terminal comprises: a signal strength or energy of a scanned signal is less than a preset threshold, wherein the scanned signal is scanned by the first network device on the first spectrum.