Agriculture as the largest user of water resources and providing for human needs, water resources management is faced with many challenges. On the other hand, climate change and weather conditions resulted in the production of agricultural products subject to this change. Scarcity of water resources due to reduced precipitation patterns change and global temperature has increased agricultural production and food supply is affected. Due to the adverse effects of climate change on various sectors of production, ecological and human communities, of climate change could be one of the most important environmental challenges mentioned century. Sistan and Baluchestan Province, one of which, unfortunately, has witnessed successive droughts and livelihood and economic problems it has caused, therefore, water management and determine an optimal cropping pattern is consistent with climate change; step is useful for planning and development of the agricultural sector. The aim of this study is to investigate climate change in the southern zone using the GCM, the effects of climate change (precipitation and temperature) crops into the region and a consistent pattern of socio-economic optimization using fuzzy multi-objective programming model is presented.