The sun as an endless source of energy can be a solution for the energy and environment problems. Non-dangerous solar energy that shines on earth is thousands times more than human’s need. The solar energy is clean, inexpensive and endless, and can be exploited in most climatic parts of the earth. The geographical position of Sistan and Baluchestan province at the furthermost southeast of country is the nearest region to the Tropic of Cancer. At half of the year the angle of sun shine is close to vertical. As we know, the identification of different regions with environmental potential capability is very important when using the energy of the region. This needs special attention. We, according to climatic parameters of shining angle, wind blowing and temperature degree, based on information achieved from 2013 till 2018 from Sistan and Baluchestan province weather bureau, and by using hierarchy analytic algorithm software, performed all calculations. Finally, the considered city was selected. This is a privilege for this vast province with high climatic potential.