Abstract: The main technical optimization principles of the Ansaldo AE94.3A EVO2+ gas turbine-generator set was introduced. A comparative technical analysis was conducted to explain the energy-saving and economic benefits of the unit, while the localization application of the AE94.3A EVO2+ gas turbine-generator set and accessories was discussed. Results show that, the energy saving, emission reduction, and economic benefits improvement of the AE94.3A EVO2+ gas turbine-generator set are remarkable. Due to some of the gas turbine components are domestically designed and manufactured, and the maintenance of the gas turbine has also achieved full independence, the overall cost of the entire units over the whole life cycle is significantly reduced.