The invention discloses a battery pack equalization system and control method considering the lifetime of batteries. The system comprises a sampling module, an equalization module, a battery lifetimeprediction module and a control module, the battery lifetime prediction module receives battery information acquired by the sampling module and predicts the lifetime of the batteries, and the controlmodule is used for receiving the battery information, acquired by the sampling module, of a battery pack and battery lifetime information obtained by the battery lifetime prediction module, calculating a voltage difference of adjacent single batteries, determining whether the voltage difference reaches a preset value, determining the adjacent single batteries required for equalization and the timerequired for equalization, and controlling the execution of the equalization module when the battery pack enters a charging and discharging state. The voltage difference of the adjacent single batteries is corrected by employing the battery lifetime information provided by the battery lifetime prediction module, the condition that the differences of the lifetime attenuation degrees of different single batteries cause inconsistent open-circuit voltages of the batteries is effectively considered, the energy waste caused by over-equalization can be avoided, the equalization efficiency is improved, the equalization time is reduced, and the lifetime of the batteries is effectively prolonged.