NOVELTY - Water and electricity cogeneration plant system comprises boiler subsystem, steam turbine subsystem, seawater desalination system and generator sub-system. The boiler sub-system is used for conveying steam with temperature that reach set value into steam turbine subsystem, or steam with temperature that does not reach set value into seawater desalination system. The steam turbine subsystem is used for converting heat energy of steam in boiler subsystem into mechanical energy and transferring into generator sub-system to generate electricity, and conveying into seawater desalination system.    USE - The system is useful for coastal thermal power plant, petroleum chemical plant, steel mill and other industrial enterprises.    ADVANTAGE - The system ensures low cost production of freshwater resources, can achieve maximum utilization of energy, and low cost hydro-generation; reduces desalination operating costs of the coastal cities and industrial enterprises, and solves the problem of freshwater shortage in coastal cities and industrial enterprises.    DETAILED DESCRIPTION - Water and electricity cogeneration plant system comprises a boiler subsystem, a steam turbine subsystem, a seawater desalination system and a generator sub-system. The boiler sub-system is used for conveying the steam with temperature that reach the set value into steam turbine subsystem, or steam with temperature that does not reach the set value into the seawater desalination system. The steam turbine subsystem is used for converting heat energy of steam in boiler subsystem into mechanical energy and transferring into the generator sub-system to generate electricity, and then conveying the steam power into the seawater desalination system. The seawater desalination sub-system is used for conveying the steam from the boiler or steam turbine sub-system to produce distilled water.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic representation of the water and electricity cogeneration plant system.