The invention discloses a lithium bromide air water-making system and method. The system comprises a solar heat absorbing plate, an evaporator is connected to an output end of the solar heat absorbingplate, a heat dissipation sheet is connected to the evaporator through a pipeline, an air washing chamber is connected to the heat dissipation sheet through a pipeline, and a circulating water pump is connected to the air washing chamber and the solar heat absorbing plate through pipelines. Through the lithium bromide air water-making system and method, water can be obtained from air, and the selection range of a water source land is widened; the water acquisition cost of people in an arid area is reduced, and the living quality is improved; a lithium bromide solution is adopted for absorbingmoisture, the efficiency is high, and the cost is low; solar energy is adopted for heating in the production process, the energy consumption is low, the energy is saved, the environment is protected,and the produced water is high in quality and can be directly used as domestic water.