Abstract: The influence of storage conditions parameters, including ambient temperature and relative humidity, on the changing pattern with time of brown rice moisture was studied by full factors combination experiments. The static weighing method was designed and the experimental data was analyzed with SAS. The mathematical model was built to describe the relationship between brown rice moisture changing pattern with time and storage conditions, including ambient temperature and relative humidity, significance level of equation less than 0.001 was tested.The results showed that ambient temperature and relative humidity of storage conditions had great influence on the brown rice moisture, the model could illustrate and predict the changing pattern of brown rice moisture under storage conditions, which can guide the safe storage and processing of brown rice.