The rack-mounted liquid-cooled load is a high-power-density testing device compatible with standard 19-inch cabinets. It is characterized by liquid-cooled heat dissipation, ultra-high power density, low noise and long-term stable operation. Specially designed for load testing and aging verification of high-power UPS, inverters, power conversion systems (PCS) and server power supplies in data centers, laboratories, military and high-end industrial scenarios, it addresses the pain points of insufficient heat dissipation and excessive noise of air-cooled loads in the high-power segment, meeting the requirements of indoor standardized and high-density deployment.