The invention discloses a public bicycle 
renting forecasting method based on multi-
source data fusion. According to the method, historical data about public bicycle 
renting / returning records, weather, temperature, holidays, festivals and the like are cleaned and preprocessed, and training datasets are acquired; the datasets are classified with a clustering 
algorithm, and different 
renting modes of public bicycles are divided; the classified datasets are used to establish a Bayesian classifier used for forecasting the renting 
modes according to conditions of holidays, festivals, weather and 
air temperature of one day in the future; a self-adaptive particle swarm neural 
network model corresponding to each mode is trained for different 
modes of datasets respectively; finally, the renting mode of one day is forecasted by the aid of the Bayesian classifier, a corresponding particle swarm neural 
network model is selected to forecast the renting law of public bicycles. The forecasting accuracy is high, the operation speed is high, reference basis is provided for bicycle renting and returning by a user, the 
duration time of the unbalanced state of a public bicycle 
station is shortened, and the users' satisfaction is improved.