The summary of disastrous weather is the basis of studying its formation mechanism and change rules and also an effective way to improve the accuracy of forecast and prediction. Decision-making meteorological service is a special service with Chinese characteristics with regard to weather change, which acts as the basis of scientific decision-making of government. The particularity of working object determines that the ability of forecasting needs to be enhanced and the technologies for decision-making meteorological service need improvement and innovation. According to the summary and analysis of the characteristics of disastrous weather and decision-making meteorological service over China in 2018, improvement measures for actual operational work and future development are suggested, aiming at establishing internal relations between disastrous weather and decision-making meteorological service and enhancing personnel's in-depth understanding in field of meteorological disaster and decision-making meteorological service. The role of decision-making service will be better played under the new situation by improving service with better forecasting skills and developing forecasting techniques according to actual service demands.