Nowadays,the mode of dairy farming in China is changing to large scale,to improve the environment of dairy farms,we should carry out the specific aspects.In particular,we should pay attention to the prevention and control of heat stress in dairy cows,because of heat stress is an important factor that causes the increase of disease incidence and the decrease of milk production.The prevention and control system for heat stress reaction of dairy cows is designed from the three-tier architecture of the internet...