Aiming at the practical application requirement of recognizing and visualizing the characteristics of complex electromagnetic environment, a radar signal environment measurement system is designed based on layered cognitive concept. The system realizes the sensing measurement of signal parameters of multiple external radar emitters. At the same time, various physical quantities are visualized in layers along with the measurement process in the form of two-dimensional coordinates. The design and implementation of the system is expected to provide an effective technical reference for electromagnetic environment perception and analysis.