A power control method, comprising: dropping, by user equipment, a sounding reference symbol, SRS, signal when the user equipment needs to transmit a physical random access channel, PRACH, signal in a secondary serving cell in parallel with SRS signal transmission in a same orthogonal frequency division multiplexing symbol of a different serving cell, if the total transmission power exceeds maximum output power of the user equipment; adjusting, by the user equipment, transmission power of the PRACH signal and/or a physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal if total transmission power of the user equipment is greater than maximum output power of the user equipment, when the user equipment needs to transmit the PRACH signal in the secondary serving cell and transmit the physical uplink channel signal in the different serving cell within the same subframe, until the adjusted total transmission power is less than or equal to the maximum output power of the user equipment, wherein the step of adjusting by the user equipment the transmission power of the PRACH signal and/or the physical uplink channel signal according to the predefined priority order of the PRACH signal and the physical uplink channel signal comprises: satisfying first the transmission power of the signal with a higher priority order by the user equipment if the priority orders are different, and then reducing the transmission power of the signal with a lower priority order, until the adjusted total transmission power is less than or equal to the maximum output power of the user equipment; and wherein the physical uplink channel signal comprises: a physical uplink control channel, PUCCH, signal, and/or a physical uplink shared channel, PUSCH, signal. dropping, by user equipment, a sounding reference symbol, SRS, signal when the user equipment needs to transmit a physical random access channel, PRACH, signal in a secondary serving cell in parallel with SRS signal transmission in a same orthogonal frequency division multiplexing symbol of a different serving cell, if the total transmission power exceeds maximum output power of the user equipment; adjusting, by the user equipment, transmission power of the PRACH signal and/or a physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal if total transmission power of the user equipment is greater than maximum output power of the user equipment, when the user equipment needs to transmit the PRACH signal in the secondary serving cell and transmit the physical uplink channel signal in the different serving cell within the same subframe, until the adjusted total transmission power is less than or equal to the maximum output power of the user equipment, wherein the step of adjusting by the user equipment the transmission power of the PRACH signal and/or the physical uplink channel signal according to the predefined priority order of the PRACH signal and the physical uplink channel signal comprises: satisfying first the transmission power of the signal with a higher priority order by the user equipment if the priority orders are different, and then reducing the transmission power of the signal with a lower priority order, until the adjusted total transmission power is less than or equal to the maximum output power of the user equipment; and wherein the physical uplink channel signal comprises: a physical uplink control channel, PUCCH, signal, and/or a physical uplink shared channel, PUSCH, signal. adjusting, by the user equipment, transmission power of the PRACH signal and/or a physical uplink channel signal according to a predefined priority order of the PRACH signal and the physical uplink channel signal if total transmission power of the user equipment is greater than maximum output power of the user equipment, when the user equipment needs to transmit the PRACH signal in the secondary serving cell and transmit the physical uplink channel signal in the different serving cell within the same subframe, until the adjusted total transmission power is less than or equal to the maximum output power of the user equipment, wherein the step of adjusting by the user equipment the transmission power of the PRACH signal and/or the physical uplink channel signal according to the predefined priority order of the PRACH signal and the physical uplink channel signal comprises: satisfying first the transmission power of the signal with a higher priority order by the user equipment if the priority orders are different, and then reducing the transmission power of the signal with a lower priority order, until the adjusted total transmission power is less than or equal to the maximum output power of the user equipment; and wherein the physical uplink channel signal comprises: a physical uplink control channel, PUCCH, signal, and/or a physical uplink shared channel, PUSCH, signal. satisfying first the transmission power of the signal with a higher priority order by the user equipment if the priority orders are different, and then reducing the transmission power of the signal with a lower priority order, until the adjusted total transmission power is less than or equal to the maximum output power of the user equipment; and wherein the physical uplink channel signal comprises: a physical uplink control channel, PUCCH, signal, and/or a physical uplink shared channel, PUSCH, signal.