The livestock farms often cover a vast area in Taiwan. It is needed to exhaust a large amount of manpower and financial resources for caring livestock in livestock farms. To care, to manage and to train livestock is an important issue for caregivers. Inefficient management strategies always influence the health of livestock. Hence, NPUST set up a Working Dog Training Center to develop dog trainers from 2004. Nowadays, this center not only is with a complete training environment and a wealth of experience but also has many breeding techniques from NPUST animal hospital. However, Working dogs activity status, health management or environmental monitoring are often required enormous manpower and material resources based on the traditional caring way. Resulting in training, caring and management of working dogs are often unable to become more efficiently. For these reasons, this study designs and develops a Livestock Health Management and Environmental Monitoring System, which is called as LEADER system, to reduce the costs of manpower and to easily handle all situations of dogs. Figure I illustrates the design concept of Livestock Health Management and Environmental Monitoring System.