A battery temperature control system is disclosed. The battery temperature control system includes a cabinet, an air conditioner, a central control module and a plurality of battery modules. Each of the plurality of battery modules includes a plurality of batteries, a control unit, a fan assembly and a temperature detecting module, wherein the central control module sends a temperature controlling command to the air conditioner to activate a cold source or a heat source according to the ambient temperature, then the central control module compares and calculates a plurality of working temperature information transmitting from the plurality of battery modules, and sends a fan operation command to the each corresponding battery module, the corresponding fan assembly activates an working mode to cool or warm the temperature of the corresponding battery module, so as to adjust the working temperature of each battery module, and to achieve a dynamic temperature balance.