In the context of global climate change, the post-epidemic era, and the challenges brought about by the abuse of antibiotics and the excessive use of pesticides, the ecological environment of urban communities is facing severe tests, human immunity is generally declining, and pandemic diseases are frequent. Urban and rural space is not only the place of human activities, but also the key node of animal habitat and environmental elements. Therefore, the health status of animals and the environment directly affects the well-being of human beings. Based on the concept of total health, we regard "human-animal-environment" as an indivisible organic whole, and use the micro-link of microorganisms to strengthen the three. The internal connection.