With the development of the information industry, improve the production process of fine for electronic product performance and quality, the control of air cleanliness and production environment is become more and more important. So is the standard design. According to the standard (GB50073-2001) and manufacturing practical experience is applied to determine the cleanliness and the temperature and humidity requirements of electronic factory. In the clean room purification design process of the project, whatever it is the new project or the transformation of the old plant. In combination with their specific production process, production processes and other requirements are used to determine the cleanliness, temperature and humidity which are needed. According to the specific conditions of the project, while also taking into account the manufacturer's economic capacity, integrated a variety of factors to determine the purification scheme, we can design that meets the production requirements which are reasonable, economical and practical for party A.