A power control method, characterized in comprising: obtaining (step 103), by a base station, IN PUCCH (i), wherein the IN PUCCH (i) is average interference noise power of a physical uplink control channel, PUCCH, carried by radio resources that are allocated by the base station at a subframe i; judging (step 104), by the base station, whether a relative difference between the IN PUCCH (i) and a power reference value IN PUCCH_REF is greater than a threshold IN TH_PUCCH; and sending (step 105, step 106), by the base station, a parameter P 0_NOMINAL_PUCCH (i) for power control at the subframe i, wherein the P 0_NOMINAL_PUCCH (i) is sent to the UE for an open loop power control of PUCCH transmit power of the UE, and wherein, if the relative difference between the IN PUCCH (i) and the IN PUCCH_REF is greater than the IN TH_PUCCH, a value of the P 0_NOMINAL_PUCCH (i) is a sum of SINR 0_NOMINAL_PUCCH and the IN PUCCH (i), and if the relative difference between the IN PUCCH (i) and the IN PUCCH_REF is not greater than the IN TH_PUCCH, the value of the P 0_NOMINAL_PUCCH (i) is the same as a value of a parameter P 0_NOMINAL_PUCCH (i-1) for the power control at a subframe i-1; wherein the SINR 0_NOMINAL_PUCCH is a first signal to interference plus noise ratio of the PUCCH obtained by the base station according to a lowest-class service used by a UE located at a cell edge and a first uplink control information format, and wherein the SINR 0_NOMINAL_PUCCH is corresponding to the lowest-class service used by the UE and satisfies a demodulation threshold requirement for demodulating feedback information carried on the PUCCH of the first uplink control information format. obtaining (step 103), by a base station, IN PUCCH (i), wherein the IN PUCCH (i) is average interference noise power of a physical uplink control channel, PUCCH, carried by radio resources that are allocated by the base station at a subframe i; judging (step 104), by the base station, whether a relative difference between the IN PUCCH (i) and a power reference value IN PUCCH_REF is greater than a threshold IN TH_PUCCH; and sending (step 105, step 106), by the base station, a parameter P 0_NOMINAL_PUCCH (i) for power control at the subframe i, wherein the P 0_NOMINAL_PUCCH (i) is sent to the UE for an open loop power control of PUCCH transmit power of the UE, and wherein, if the relative difference between the IN PUCCH (i) and the IN PUCCH_REF is greater than the IN TH_PUCCH, a value of the P 0_NOMINAL_PUCCH (i) is a sum of SINR 0_NOMINAL_PUCCH and the IN PUCCH (i), and if the relative difference between the IN PUCCH (i) and the IN PUCCH_REF is not greater than the IN TH_PUCCH, the value of the P 0_NOMINAL_PUCCH (i) is the same as a value of a parameter P 0_NOMINAL_PUCCH (i-1) for the power control at a subframe i-1; wherein the SINR 0_NOMINAL_PUCCH is a first signal to interference plus noise ratio of the PUCCH obtained by the base station according to a lowest-class service used by a UE located at a cell edge and a first uplink control information format, and wherein the SINR 0_NOMINAL_PUCCH is corresponding to the lowest-class service used by the UE and satisfies a demodulation threshold requirement for demodulating feedback information carried on the PUCCH of the first uplink control information format.