f
0F
2 and M(3000)F
2 calculated using CCIR maps,which is adopted by the International Reference Ionosphere,and that calculated using the Asia Oceania Region (AOR) F
2 Layer Prediction Method are compared with data observed in the 21st solar activity cycle in China.It is noticed that the AOR method gives much more accurate prediction in China,therefore it is suggested that the AOR F
2 layer prediction method should be adopted in the future in "The Reference Ionosphere of China".