Abstract:Because different meteorological disasters have different spatial forms, the lin ear and polynomial models are put forward to carry on the risk assessment of met eorological disaster. Taking hail disaster as example, the comprehensive discuss ion is conducted in these three aspects of principle, method and process of assessment. The spatial evaluation model of hail disaster superimposes sensibility f actor of topography, risk occurrence probability and vulnerability which relates to the distribution of population, economy and humanity in land surface. The te chnology of the geographic information system is adopted to deal with assessment results in spatial visible way. Risk condition of various meteorological disast ers during Olympic Games in Beijing area is embodied in evaluation results. Risk of hail disaster is closely related to distribution of hail source as well as p opulation in urban and situation of society and economy. These also determine thatcentral region in Beijing city is high risk area of hail disaster. Probabilit y distribution of rainstorm, for example, in different intensity grade reflects essentially spatial possibility that corresponding disaster occurs.