Abstract: The use of condition monitoring methods is known in the electrical power systems domain for many years. Recently it has been going interest in the animal health monitoring. Pedometer binding on the legs caused the mistakes due to the different habits between left and right legs. The solution involves a cow wearing an intelligent collar that picks up on subtle movements with the pedometer, provide the methodology and progress of cow's estrus detection and health monitoring. Estrus and health conditions can be monitored accuracy and the effectiveness can be improved via calculate, analyze and process the data of moving average and slope of linear regression.

Key words: cows; estrus; health monitoring; sensitivity; false positive