In considering the global power generation industry, fossil fuel power plants still dominates where LNG presents one of the major clean fuel source. Although Taiwan remains as one of the main importers of LNG in the world, the cold energy was not utilized effectively which only accounts for 8% of total. Especially, the hot and humid local climates caused the Gas turbines to work under low efficiency which presents significant room for improvement when inlet cooling technology was imposed. In this research, the inlet cooling process using mechanical chillers, absorption chillers, and LNG cold reclaim technology were simulated using the Thermoflex software in a tpical combined cycle environment. The waste heat from the power plant was further utilized for Sea water desalination purposes under MED process. Simulation result indicated that , in using 2% of the waste heat from the plant, and produce 60 tons per hour of fresh water , at the cost of power output reduction of 1 %. Further simulation result also validated the economic feasibility which warranted engineering application potentials.