ABSTRACT
Human life on Earth needs a good environment, EMI as a public hazard in the 8th has attracted people's attention. Monitoring human living environment, its protection of the environment meet the established criteria, the requirements of environmental protection.
This paper mainly introduces the design of the EM radicalization system, included the signal receiving system, power detection system, and DB display system and ect. signal receiving system is mainly about the design of the antenna, the main function of it is to gather the signal from the around space, transfering it to a HF signal. poewr detection system contains the design of the low noise amplifier and logarithm amplifier .the main function of it is to transfer the HP signal to DC. The digital head of the DB display system is to show the number of DB. With the aim of detection, it shows the distribution of the radicalization in a quantitative way.