NOVELTY - An upward outlet pipe (260) supplies salty water flowing out from a pressure pump (240) to a main reserving tank (110). A screw moving device (160) actuates an upper fixing pin (238) or a lower fixing pin (239) while interworking with salty water reserved in a pressure barrel (220). A control box (222) controls the screw moving device.    USE - Energy generating system.    ADVANTAGE - Produces clean energy while eliminating worries about exhaustion of energy resources as well as generation of any environmental pollutant materials. Does not require high power facilities, power transmission tower and power modulation facilities, thus facilities are simple, constructional expense is lowered, safety accidents are reduced and management is eased. Enables convenient use by many people who are in difficulty without feeling burdened since producing price is low.    DETAILED DESCRIPTION - An electric power generating system (100) includes the main reserving tank for containing salty water which, when discharged, rotates at least one spinning wheel (130) and operates a generator of an electric power generating device (140). The salty water is collected in a water collecting barrel (150) operated with a subsidiary reserving tank (120). A subsidiary water collecting barrel (155) is connected through a salty water passing pipe (154) to the water collecting barrel. A salty water supplying system (200) includes the pressure barrel that is installed on one side end of a pressure rod (210) relative to an eccentric shaft (213) to reserve salty water supplied from the subsidiary water collecting barrel. An actuating plumb unit installed in the other side end of the pressure rod allows the pressure barrel to rise when the salty water in the pressure barrel is completely discharged. An inlet barrel (250) supplies the salty water to the pressure pump which is actuated by a main push rod (212). A buoyant body (171) installed in an inflow barrel outlet pipe (173) formed inside the inlet barrel has a recognition line (172) that is buoyed by the salty water. An activation sensor (170) detects the recognition line to balance the amount of salty water inflow into the pressure barrel and the amount of salty water inflow by the pressure pump.    DESCRIPTION OF DRAWING(S) - The figure shows the structure of the energy generating system.    Electric power generating system (100)    Main reserving tank (110)    Subsidiary reserving tank (120)    Spinning wheel (130)    Electric power generating device (140)    Water collecting barrel (150)    Salty water passing pipe (154)    Subsidiary water collecting barrel (155)    Screw moving device (160)    Activation sensor (170)    Buoyant body (171)    Recognition line (172)    Inflow barrel outlet pipe (173)    Salty water supplying system (200)    Pressure rod (210)    Main push rod (212)    Eccentric shaft (213)    Pressure barrel (220)    Control box (222)    Upper fixing pin (238)    Lower fixing pin (239)    Pressure pump (240)    Inlet barrel (250)    Upward outlet pipe (260)