Take HVAC project of China's Scientific Development Concept Exhibition Hall in Taizhou for example. Based on the rules and requirements of energy saving and using in the Green Building Evaluation Criteria, explore the green building realization model which adopts the low-cost energy saving technology and minimizes the environmental pollution in the entire life cycle of the building. It is desirable that the hall, with a blend of geographical features, be a comfortable, healthy and environment-friendly cultural building of international influence.