As the realization form of the Internet of things in the field of environmental protection, it aims to construct an multi-directional, multilevel and environmental protection for the whole ecological environment monitoring network. But for now, mainly its application model is the pollution sources on-line monitoring. This article narrates the application model of function and the characteristic with the practical environmental protection business and the environmental protection structure layers of the Internet of things. It analyzes the deficiencies and causes. And it makes a prediction of the trend of future development about the Internet of things in the field of environmental protection.