Abstarct: Today, energy as one of the factors of production, great contribution to the growth and development of different countries. Non-renewable fossil fuels along with the pollution that they produce, led human to the thought to find new sources for energy. The renewable energies have a much lower environmental impact than fossil fuels and somehow they can't be ended. There are various methods and ideas for the simultaneous generation of heat and electricity using photovoltaic cells and thermoelectric modules to help solar energy but the use of thermoelectric modules and Fresnel lens Solar concentrator provides the possibility of generating electricity and heat with high thermal efficiency. In this study, two different systems for producing fresh water and power have been used. The first system, a small cell made of copper, has a tempered glass at its upper surface and is located on the lower surface of the thermoelectric generator. Sun radiation after crossing the Fresnel lens shines in salt water inside the cell. The steam produced is fed into a chamber that is cooled with a thermoelectric cooler. In this small-sized cell, 47 ml of fresh water is produced within 2 hours. In the second system, 7 Fresnel lenses are placed on the vacuum tube and the thermoelectric generator's hot surface is in contact with the water inside the tube. In this system, 0.403 liters of fresh water is produced within 4 hours. The thermal efficiency of the fresh water of the first system is 39.21%, the thermoelectric generator efficiency is 2.65% and in the second system, the thermal efficiency of fresh water is 23.37%, the thermoelectric generator efficiency is 2.49%.