It is very significant to provide highlevel weather service for largescale events such as the 60th anniversary of National Day of the People’s Republic of China. In order to continuously improve the quality of largescale event weather service, it is necessary to assess the customer satisfaction degree of weather service from the users’ point of view. In this paper, the decisionmaking weather service for the 60th anniversary of National Day of the People’s Republic of China, was generally assessed using a weather service customer satisfaction degree index (WSCSI). The perception of users’ needs, weather service quality, ways of weather service, the ability of onsite service, weather early warning, emergency weather service and the overall benefits of weather services were analyzed deeply. Analysis results have shown that the average WSCSI reaches 97%, and the WSCSI for high impact weather reaches only 93%, thus the gap between satisfaction and expectation for it is relatively wider (6.7%). Further analyses have indicated that weather services satisfied customers’ needs in high level， and the ability of forecast and service for high impact weather still needs to be improved. Through the impact assessment on weather service, meteorological department could thoroughly learn the service social and economic effects and find where need to improve, and thus strive to take measures to fill the gap between customers’ satisfaction and expectation. It is helpful for meteorological department to gather experiences for the decisionmaking weather service of largescale event.