With the development of the society, the requirement of manufacturing house is becoming more and more serious. For better products, we must control the temperature & moisture very well, especially control the moisture.It is easy to produced static if the house is too dry. In additional, the dust will fly in the air if the air is too dry. Like this, the respiratory disease will be induced, then affect the physical and mental health of workers and leads to decreased efficiency. Generally speaking, The temperature of the electronic workshop is controlled at about 22 degrees centigrade,the relative humidity is controlled at 40~60%. Under such circumstances,people will feel very comfortable, the static electricity also disappeared.