研究期間:10205~10212;The change of temperature and rainfall patterns caused by climate change will change the growth and the yield of crops. Most of researches assess the impact of climate change on crops use the crop growth model. In this study, the Decision Support System for Agrotechnology Transfer (DSSAT) software package was used. For the weather data of input in DSSAT, the model to generating the weather data was proposed. Then, the impact of rice yield of the first period crop for the future in Taoyuan was assessed. Climate change also affects the irrigation water requirements of paddy rice. Therefore, this study estimates the change of the irrigation water requirement of the first period crop for the future in Taoyuan with growth stages.