With the rise in global warming and the establishment of carbon emission targets, the energy efficiency of mobile networks has become a critical concern for network operators. According to IEEE research, the power consumption of base stations takes up 50-60% for private networks, showing the opportunities and challenges in this area. To meet the market demands, ITRI developed Athena Orchestrator - O-RAN SMO & RIC and created an energy-saving 5G O-RAN private network solution for smart factories with leading electronics manufacturer PEGATRON Corporation.