In order to meet the requirements of safety, economy and detection accuracy of electronic fence system, an intelligent electronic fence monitoring scheme is proposed. The functional structure and system architecture of the electronic fence system are designed, and on this basis, the software and hardware composition scheme is designed; the models of echo signal preprocessing, feature extraction and intrusion detection are proposed; the effectiveness of the proposed scheme is verified based on the electronic fence data provided by a company. The results show that the feature extraction model can effectively extract the signal features and improve the classification performance, and the classification accuracy of the echo detection model is 89.3%. This scheme provides a reference for the safe management and stable operation of the electronic fence system.