In order to explore the applied value of the NCEP/NCAR reanalysis temperature data in studies on agricultural meteorology and environmental meteorology,this paper demonstrates the reliablity of the NCEP/NCAR data in context of the real ground surface observational data in Beijing,Nanjing,Guangzhou,Zhengzhou,Kunming,as well as Sanya.Using four kinds of interpolation methods,namely Cressman interpolation,parabolic interpolation,linear interpolation,parabolic and linear interpolation,the daily surface average temperatures of the NCEP/NCAR data are interpolated to the above six stations,and results from different interpolational methods are compared.Results show,for stations on a higher latitude north of 30°N,the bilinear interpolation method is better,but its accuracy is slightly lower.And for stations on a lower latitude south of 30°N,the Cressman interpolation is better,and more accurate.This may be related to that there are more missing data in the higher latitude.The paper proves that applying the interpolated temperature data to the analysis of the climatic adaptation of the seed production of two-line hybrid rice Pei’ai 64S in Tailand is feasible.