Pollution discharge management is important for the sustainable development of the chemical enterprise, and the monitor system of pollution discharge is an important part for improving the pollution discharge management of the chemical enterprise, therefore the application of the Internet of things on it is studied in depth. Firstly, the main technology problems of the monitoring system of pollution discharge in chemical enterprise are summarized. Secondly, the relating technologies of the Internet of things are studied. Thirdly, the monitoring system based on Internet of things of the pollution discharge in chemical enterprise is designed. Finally, simulation analysis is carried out, and the effectiveness of the monitoring system is verified.