Abstract: In order to accurately monitor the loss and theft of livestock and other positioning anomalies, and achieve scientific management of livestock, this study developed a livestock abnormal behavior alarm monitoring management system based on browser/server（B/S） mode, and this system was used in three pastures of New Barag Right Banner in Hulunbuir City, Inner Mongolia Autonomous Region. The results showed that through the collection and transmission of livestock behavior data, the system can realize the virtual electronic fence functions such as livestock judgment, abnormal behavior alarm and visual monitoring, etc., and the system could effectively monitor the behavior and activity of livestock; the accuracy of in-fence judgment of livestock was 100%, and the accuracy of abnormal behavior alarm was 100%. The activity data was collected in time, and the visualization analysis was intuitive. It suggested that the system makes animal husbandry management more scientific and effective.