The dimension reducing processing was conducted by means of the EOF method on a number of the environmental field and series periodic factors with definite physical meanings.In collaboration with the artificial neural network (ANN) scheme,a qualitative forecast model for the annual frequency of tropical cyclones and summer (June to August) rainfall affecting Guangxi was worked out.The results indicate that this model has a better qualitative capability of predicting the annual frequecy of tropical cyclones and sumer rainfall over Guangxi and can be taken as an auxiliary operational short term climate prediction technique.