Abstract: When the flow rate of triacetin is under the low limit of the flow meter at lower temperature, the flow meter fails to work properly. Therefore, a liquid level monitor was installed in a centralized triacetin supplying system to measure the triacetin consumption through the change of liquid level. A method named as "Virtual Flow Meter"was proposed which estimated the average flow rate at various temperatures with the temperature-flow curve obtained by measuring actual flow rate at various temperatures. The results of study showed that this method was reasonable in design, the results of measurement and calculation were basically accurate, and it met the requirement of cost management.