We used the thermal effluent discharged from the Jeju Power Headquarters of KOMIPO as a cooling and heating system to analyze the energy savings of the greenhouse facilities and conduct a study on the growth environment of blood orange using the power plant thermal effluent cooling and heating system. Through the demonstration operation from 2018 to 2020, the cumulative renewable energy production of the power plant''s thermal effluent system was 75.7TOE, and the energy savings were calculated as 22.89TOE, assuming only heating and 85% of the boiler efficiency. In addition, the amount of greenhouse gas reduction is calculated as 114.24tCO2. When this system is operated for 8 hours for 100 days for heating and 11 hours for 150 days for cooling, the expected new and renewable energy production, energy savings and greenhouse gas reduction are calculated as 203.1TOE, 53.3TOE, and 265.8tCO2 respectively. Therefore, it was confirmed that this system can reduce energy by 30% and greenhouse gas by 50% or more compared to conventional kerosene boilers. In addition, the number of fruits in 2020 was 4.75 times more than in 2019, and the fruit diameter were 10.6% smaller and the fruit length was 5.1% smaller. The average leaf area in 2020 is 11.7% larger than in 2019, and the average fresh weight is 3.5% smaller, but the average dry weight is 26.6% larger, which is judged to contain a large amount of nutrients. Through this study, when applied to the cooling anf heating system of a greenhouse facilities using the power plant''s thermal effluent, it can contribute to the competitiveness and income of farmers by reducing operating costs and increasing productivity by reducing heating costs. Also reduction of carbon dioxide emissions is expected to contribute to national greenhouse gas reduction targets.