The invention discloses a meteorological element forecasting method and system, belongs to the technical field of meteorological forecasting correction, and solves problems that, in the prior art, a traditional mode output statistical forecast cannot obtain a nonlinear relationship, real-time updating cannot be realized due to slow calculation. According to the meteorological element forecasting method and system, historical statistics is carried out on forecast data of one or more modes, historical meteorological correlation between the fixed station mode forecast data and the actual observation data is acquired, the characteristic relation of mode elements is optimized, multiple meteorological factors are considered, a characteristic factor relation network is effectively constructed, synchronous prediction is achieved, mode data correction is achieved, statistical correction of the average wind speed, the highest temperature, the lowest temperature and rainfall of a fixed station can be achieved on the basis of the framework, and prediction accuracy is improved.