Abstract: The exhaust gas temperature of the gas turbine affects the efficiency of gas-steam combined cycle plant. The effective control of the exhaust gas temperature depends on the temperature control strategy of the gas turbine. This paper introduces the design principle and control method of temperature control for GE gas turbine. Regarding the calculation process of different types of temperature control curves, corresponding optimization methods are analyzed and explored. Based on the exhaust temperature and economic requirements, and then combined with the performance of existing equipment, the IGV temperature control line (TTRXGV), pressure ratio temperature control line (TTRXP), and power temperature control line (TTRXS) are optimized for temperature control strategies. After the optimization, the gas consumption of gas turbine is reduced by 0.000 5 m³/kWh after being converted into pure condensing condition. The economy is improved under the condition that the requirements are satisfied for secure and stable operation of the gas turbine, which demonstrate the effectiveness and reliability of the optimization method.