Abstract: Radio frequency planning is the foundation of accelerating the development of broadband wireless mobile communication industry, while the spectrum demand forecast is the key of it. This paper provides an innovative hierarchical spectrum demand forecast method based on the ITU-R M.1768 recommendation, game theory and gray prediction. In the hierarchical forecast, firstly it predictes the total spectrum demand of IMT system according to China’s market data, secondly it forecastes the accurate proportion of TDD and FDD demand based on the using status and development strategies of China’s telecommunication operator enterprises, at last it puts forward spectrum planning reference suggestions of IMT system to China.