A water generation system for deserts is provided as a water generation system designed for desert climate areas and constructed in a surface pavement and generally includes a sand layer, which includes a water tank embedded therein and is covered with a moisture locking cloth on which a grading layer is laid. A water resisting cloth is arranged in the grading layer. Hollow water penetration tubes are arranged above the grading layer and have bottoms extending through the water resisting cloth and inserted into the grading layer with pouring and grouting of grout cement thereon to form a water pervious layer. As such, rainwater can be quickly conducted into the sand layer for storage for subsequent uses and air can be conducted into the grading layer to subject to condensation for forming condensed water on an undersurface of the water resisting cloth to achieve a purpose of automatic water generation.