NOVELTY - A desalinating system comprises a fuel gas power subsystem, a vapor generation subsystem, a steam drying subsystem, a hot air drying subsystem, a seawater hot air concentration subsystem, a seawater cold multi-effect vacuum concentration subsystem, a dust salt cooling subsystem, a seawater pre-treatment subsystem, and a desalinating water treatment subsystem.    USE - A system for producing electricity, salt and desalinated water.    ADVANTAGE - The system utilizes fuel gas power after heating to produce steam gas and hot air, vaporizes high salinity seawater to obtain salt in the superheated steam and hot air, and utilizes the remaining heat of hot air to heat, vaporize and concentrate seawater to obtain high salinity seawater and desalinated water.    DETAILED DESCRIPTION - A desalinating system comprises a fuel gas power subsystem, a vapor generation subsystem, a steam drying subsystem, a hot air drying subsystem, a seawater hot air concentration subsystem, a seawater cold multi-effect vacuum concentration subsystem, a dust salt cooling subsystem, a seawater pre-treatment subsystem, and a desalinating water treatment subsystem. The fuel gas power subsystem provides electric power to the system and transports the electrical power to the electric network. The vapor generating subsystem utilizes the residual heat from the fuel gas power subsystem to produce superheated vapor. The steam drying subsystem utilizes the superheated vapor to boil high salinity seawater and dry the seawater into tiny salt granules. The air in the hot air drying subsystem cools the steam and absorbs the heat to obtain hot air, which can also boil the high salinity seawater and dry the seawater into tiny salt granules. The hot air enters seawater hot air concentration subsystem to control temperature and humidity of hot air in the hot air drying subsystem after absorbing moisture to a certain humidity. The seawater hot air concentration subsystem is used for moisture treating the hot air and solidifying the desalinated water on the surface of the air cooler. The cooled air returns to steam condenser of the steam drying subsystem. The seawater cold multi-effect vacuum concentration subsystem vaporizes hot seawater in multi-stage vacuum environment, transforms sensible heat into latent heat of the steam and cools seawater and concentrates into desalinated water. The dust salt cooling subsystem cools the dust salt of higher temperature produced by the steam drying subsystem and the hot air drying subsystem into normal dust salt that is easily packaged. Ambient air that passes through filter treatment enters the seawater hot air concentration subsystem with heat and moisture from the dust salt. Heat of the dust salt is recovered. Atmosphere in the hot air drying subsystem and seawater hot air concentration system is maintained. The seawater pre-treatment subsystem provides clean seawater to the seawater cold multi-effect vacuum concentration subsystem. The desalinated water treatment subsystem comprises cooling temperature reduction and water conditioning.