The invention relates to a flood forecasting method and device, and belongs to the technical field of electronics. The method comprises the following steps of: when a preset flood forecasting triggerevent is detected, determining hydro meteorological features of a target area in pre-divided areas on the basis of pre-obtained hydro meteorological data; determining at least two flood forecasting methods in a plurality of preset flood forecasting methods on the basis of the hydro meteorological features; determining at least two flood forecasting models in a plurality of preset flood forecastingmodels on the basis of the hydro meteorological features; determining a first flood forecasting result corresponding to the determined at least two flood forecasting methods on the basis of a presetcorresponding relationship between the at least two flood forecasting methods and flood forecasting results, and determining a second flood forecasting result on the basis of the determined at least two flood forecasting models; and determining a target flood forecasting result according to the first flood forecasting result and the second flood forecasting result. The method and device are higherin forecasting flexibility and can be applied in complicated environments.