NOVELTY - A renewable energy electric power generation seawater desalination system comprises renewable energy electric power generation system as entire system power supply, seawater pre-treatment device (1), pump (2) used for pumping-out seawater in seawater pre-treatment device, reverse osmosis device (3) used for separating seawater into fresh water and salt water which has 1 input port, and 1st output port and 2nd output port which are connected to fresh water pipeline and salt water pipeline, and pressure holding tank (8) used for maintaining reverse osmosis device input port pressure stability.    USE - A renewable energy electric power generation seawater desalination system (claimed).    ADVANTAGE - System reduces water pressure fluctuation in reverse osmosis device input, stabilizes water pressure and the flow rate, and reduces damage on reverse osmosis device due to large differential pressure resulting to ensured working property and prolonged use life.    DETAILED DESCRIPTION - A renewable energy electric power generation seawater desalination system comprises renewable energy electric power generation system as entire system power supply, seawater pre-treatment device (1), pump (2) used for pumping-out seawater in seawater pre-treatment device, reverse osmosis device (3) used for separating seawater into fresh water and salt water which has 1 input port, and 1st output port and 2nd output port which are connected to fresh water pipeline and salt water pipeline, and pressure holding tank (8) used for maintaining reverse osmosis device input port pressure stability in which pressure holding tank is provided with 1st interface and 2nd interface where 1st interface through input pipeline is connected to pump output end, and 2nd interface is connected to reverse osmosis device input port.    DESCRIPTION OF DRAWING(S) - The drawing shows a structural schematic diagram of a seawater desalination system.    Seawater pre-treatment device (1)    Pump (2)    Reverse osmosis device (3)    Saltwater storage device (4)    Pressure holding tank (8)