A Heating, Ventilating and Air Conditioning (HVAC) system is a crucial system in a pharmaceutical facility. It has significant impacts on whether the pharmaceutical facility is able to attain the objective of providing patients with safe and effective products. This system comprises the control systems for temperature, humidity, air cleanness, and air circulation. The running of the HVAC system entails a great deal of energy. The design of our system aims at ensuring environmental protection, minimizing energy consumption, and improving the reliability as well as the service life of the system on top of meeting the production requirements.