The foundation of "smart environmental protection" is the Internet of Things. Based on the in-depth development of "digital environmental protection" platform and Internet of Things technology in the field of environmental protection, building a nationwide Internet of Things system is the first step to realize the transformation from "digital environmental protection" to "smart environmental protection". It will lay a good foundation for the comprehensive promotion of "smart environmental protection" to carry out "smart environmental protection" pilot projects in areas with good foundation in China, establish an environmental monitoring network, collect environmental information such as pollution source data, water environmental quality data, air environmental quality data and noise data in real time, implement intelligent remote monitoring of key areas and key enterprises, and intelligently analyze all kinds of environmental information.