The work aims to research the storage and transportation containers of ammunition in the high-temperature and high-humidity areas in order to ensure the storage quality and transportation safety of ammunition. The relationship between the storage quality and use reliability of ammunition and the temperature and humidity of environment was studied with temperature and humidity theoretical analysis and data fitting method, starting from packaging attributes and the change law of ambient temperature and humidity. Various kinds of external environmental influences should be considered for ammunition containers in southern areas with high temperature and high humidity, through which the internal temperature change model can be established. By means of calculation, the internal temperature of container packaging obtained could be up to 70.77 ℃. The maximum internal temperature of ammunition containers in some place could be set as 75 ℃. Excessively high or low ambient temperature and humidity for the storage and transportation of ammunition is the main factor that makes the ammunition quality change. Excessively high or low ambient temperature and humidity will accelerate the aging of all the components and materials of ammunition.