We extracted in this research the extent to which we benefited from the photovoltaic energy in cooling according to the climatic conditions in southern Libya, considering the south a desert region, the design of the photovoltaic system and the calculation of solar radiation over a whole year, and from the economic feasibility to show us that the use of photovoltaic energy In cooling, it is of high quality and high efficiency in southern Libya, but it is relatively expensive compared to the price of electrical energy in the public network, given that Libya is a country rich in oil resources, and also provides full independence.