Abstarct: In this study, the cold energy of liquefied natural gas (LNG), which is released during its regasification, is utilized for electricity generation and seawater desalination. LNG at a temperature of -162°C is introduced into a power cycle consisting of three ORC cycles, generating 1.126 MW of electricity. The LNG exits the cycle at a temperature of -50°C and enters the seawater desalination process, where it reaches ambient temperature and natural gas conditions. In this way, the residual cooling energy of the LNG is utilized to desalinate seawater. In this process, 53.58 kg/s of fresh water is produced in 6 freezing desalination units. Through a degree of freedom analysis, the pressures of the first and second cycles are identified as decision variables for optimization, and their effects on the overall power generation of the cycle were evaluated through sensitivity analysis. Then, using the surrogate model method, the power cycles were optimized to achieve the maximum net work output. The calculations revealed that a first cycle pressure of 11 atm and a second cycle pressure of 5.2 atm produce the highest net power output of 122.04 MW. Economic analysis showed that the net present value (NPV) at a 15% discount rate is $4,601,975,655, the internal rate of return (IRR) is 22.37%, and the return on investment (ROI) is 8.25%.