This paper combines the Internet of things technology with environmental protection and embeds passive RFID in the environmental protection equipment for real-time data acquisition to promote energy saving renovation work. Design passive RFID antenna and simulate the designed antenna. RFID tags need to mount on metallic objects in many practical applications. However, these tags may cannot operate normally because that electromagnetic wave scattering from the metal plane. Output the simulation results of the input impedance and return loss to indicate the design of the antenna is feasible and the advantages of RFID technology in the application.