The invention relates to a lithium ion battery pack temperature management and control method. The lithium ion battery pack temperature management and control method comprises the following steps of (a) sampling all temperature sensors in a lithium ion battery pack through a power management system; (b) determining the temperature with the highest measured temperature; (c) determining the temperature range of the temperature sensor and issuing alarm when the temperature T of the temperature sensor reaches above 80 DEG C. No matter whether the lithium ion battery pack is in a charging, discharging or other state, the lithium ion battery pack temperature management and control method can achieve alarm issuing, at a relatively low temperature simply by determining the temperature range of the position at the highest temperature through sampling by the temperature sensors, because at the moment, side reaction has taken place in lithium battery materials at around 80 DEG C and certain safety measures is supposed to be taken, otherwise, major safety accident might be caused when smoke emerges.