A power adjustment apparatus, comprising: a receiving module, an obtaining module, an adjustment module, and a sending module, wherein the receiving module is configured to receive a signal sent by a terminal device; the obtaining module is configured to obtain a signal quality indicator according to the signal received by the receiving module, wherein the signal quality indicator is used to identify signal quality of a signal sent by the power adjustment apparatus and received by the terminal device; the adjustment module is configured to adjust a transmit power according to the signal quality indicator after the obtaining module obtains the signal quality indicator; and the sending module is configured to send a signal according to the transmit power adjusted by the adjustment module; wherein the apparatus further comprises: a statistics collection module, wherein the statistics collection module is configured to collect statistics on minimum values of signal quality indicators at intervals of a first preset time period, and calculate an average value of the minimum values at intervals of a second preset time period, wherein the adjustment module is specifically configured to adjust the transmit power according to the average value of the minimum values after the statistics collection module obtains the average value of the minimum values; wherein when the signal quality indicator is a signal quality value, the adjustment module is specifically configured to determine a change trend of the average value according to at least two successive average values after the statistics collection module obtains the average value of the minimum values, and adjust the transmit power according to the change trend of the average value. the receiving module is configured to receive a signal sent by a terminal device; the obtaining module is configured to obtain a signal quality indicator according to the signal received by the receiving module, wherein the signal quality indicator is used to identify signal quality of a signal sent by the power adjustment apparatus and received by the terminal device; the adjustment module is configured to adjust a transmit power according to the signal quality indicator after the obtaining module obtains the signal quality indicator; and the sending module is configured to send a signal according to the transmit power adjusted by the adjustment module; wherein the apparatus further comprises: a statistics collection module, wherein the statistics collection module is configured to collect statistics on minimum values of signal quality indicators at intervals of a first preset time period, and calculate an average value of the minimum values at intervals of a second preset time period, wherein the adjustment module is specifically configured to adjust the transmit power according to the average value of the minimum values after the statistics collection module obtains the average value of the minimum values; wherein when the signal quality indicator is a signal quality value, the adjustment module is specifically configured to determine a change trend of the average value according to at least two successive average values after the statistics collection module obtains the average value of the minimum values, and adjust the transmit power according to the change trend of the average value. a statistics collection module, wherein the statistics collection module is configured to collect statistics on minimum values of signal quality indicators at intervals of a first preset time period, and calculate an average value of the minimum values at intervals of a second preset time period, wherein the adjustment module is specifically configured to adjust the transmit power according to the average value of the minimum values after the statistics collection module obtains the average value of the minimum values; wherein when the signal quality indicator is a signal quality value, the adjustment module is specifically configured to determine a change trend of the average value according to at least two successive average values after the statistics collection module obtains the average value of the minimum values, and adjust the transmit power according to the change trend of the average value.