Abstract: Aiming at the meteorological disaster prevention and mitigation service of rainstorm disaster, the index of decision service benefit, public service benefit, social service benefit and inevitable loss factors were mainly considered, and the benefit evaluation model of meteorological disaster prevention and mitigation service of rainstorm disaster in Hunan province was established based on the backstepping method. The model was used to evaluate the meteorological disaster prevention and mitigation service benefit of six typical rainstorm weather processes in Hunan province from 2011 to 2015. The results showed that in recent years, the decision service benefit and social service benefit of rainstorm disaster in Hunan province were basically on the rise, and the public service benefit fluctuated greatly; the benefit of meteorological disaster prevention and mitigation service of rainstorm disaster accounted for 38.6%~57.0% of the direct economic loss of disaster, and the benefit of meteorological disaster prevention and mitigation service in a single rainstorm process was up to 1.366 billion yuan.

Key words: rainstorm disaster, backstepping method, meteorological disaster prevention and mitigation service benefit evaluation, meteorological service benefit value, Hunan province