TKU has introduced ISO50001 since 2015 to enable organizations to establish systems and processes to improve energy performance, including energy efficiency, use, and consumption. The systems are compatible with different organizational forms and energy use requirements, including performance monitoring and measurement, important management process documentation and performance reports, equipment design and procurement processes, etc., to show compliance with regulations and stakeholders' requirements. According to the requirements of the ISO50001 energy management system, TKU handles the energy audit work of each campus every year to grasp the energy-intensive units and space equipment, and further implement energy management. After five years of operation, it has mastered the bulk of campus electricity consumption (for example, the top 20 electricity users), and then adopted the 80/20 rule to focus on the above improvement opportunities as they need to establish energy baselines, energy performance indicators and other verification tools due to the system, internalized to each campus general affairs unit for continuous processing.