Abstract: The grey relation degree between sugarcane yield and meteorological factors over the years, such as temperature and precipitation, in the main sucrose countries worldwide, including Brazil and Australia was studied. It was concluded that the major meteorological factors and its crucial duration affected sugarcane yield in those countries had been determined. The results would establish the oretical foundation for the monitoring of global sucrose output and forecast service in China.

Key words: Sugarcane, Sugarcane, Yield, Meteorological factor