This project attempted to comprehend ‘the agriculture as a system of relationship between human and nature’, with a view to identifying current and future challenges, and effective countermeasures against possible climate changes. Based on a comprehensive assessment of the basic structure of agricultural production system with special reference to regional climate, land and water use, cropping pattern and irrigation system, the project attempted to predict and evaluate the impacts of future climate change and the regional adaptability. Finally, the correlations between changes in nature and human activities are to be examined in an integrated manner. In this process, regional climate change prediction with higher resolution is critical to precise impact assessment. In this paper, the ICCAP is outlined focusing on its challenging aspect to develop the methodology with some primary outputs. The possible problems were assessed through projected impacts including temperature rise, precipitation decrease, sea level rise, and so on.