Nowadays, along with the increasingly short energy, the whole social pays more attention to the research on energy saving. As a main consumer of energy, the building industry takes up about 30% of the total energy consumption. And the research on energy saving in building industry has never suspended since 1970s.The Design standards for energy efficiency of public buildings (GB50189-2005) was put into practice in July 1st, 2005, which puts forward higher requests to the energy saving of buildings. On the ba...