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A real-time analysis system of crop-climatic suitability is introduced. Based on fuzzy mathematics and the necessary meteorological conditions for crop growth and development, the suitability of meteorological factors to crop growth such as air temperature, rainfall and sunshine are computed using the analysis system for different periods of time. The system output adopts grid and graphic formats. It is shown that the analysis results of crop-climatic suitability by the system for different crops and time periods are consistent with the real conditions, and also it gives a quantitative analysis for agricultural meteorological operational service.