The BAS system monitors all cold source equipment including chillers, cooling water pumps, supply & return water pipelines and buffer water tanks. It collects real-time data such as outdoor temperature & humidity, supply/return water temperature, pipeline pressure, unit operating frequency and equipment load. Users can set a unified cooling target value; the system automatically balances the load of multiple units and intelligently adjusts cooling output. It maintains constant temperature in the computer room while cutting refrigeration power consumption.