The paper construct the foresight model based on Delphi method and BP neural network. Based on patent analysis, high value patents are extracted so as to provide scientific and objective reference points; When the expert evaluation data is processed, the performance index is introduced so that the influence of expert familiarity is taken into full consideration, and the entropy weighted -TOPSIS method is used to evaluate the comprehensive score of patent; BP neural network algorithm is used to evaluate the score, and the influence of human in the weight calculation is weakened, and the feasibility is verified by comparison. Taking intelligent manufacturing field as an example, empirical studies are conducted and the model is validated.