Year 2007 can be defined as a decisive-battle-year for the preparation of Beijing Olympics.To realize the notion of “Green Olympics”，The Beijing Organizing Committee for the Games of the XXIX Olympiad（BOCOG）have made great effort to construction of sport stadiums，air quality control，traffic problem，urban greenification，water regulating and saving etc.All of these have obvious progress，but lots of work need to be done for the improvement of the entire ecological environment of Beijing city.