Abstract: Stealth technique is feature control technology which makes radar detect more difficulty by controlling the signal feature. The essence of stealth technique is reducing RCS in different fields using corresponding methods in order to achieve stealthy aim ; whereas achieve anti-stealthy aim. This paper summarizes the principle and actuality of stealth and anti-stealth technique, also depicts the theoretic gist and development of modem stealth and anti-stealth technique in direction of radar/EW, and at last expounds the application future of synthetic electronic stealth technique in modem war field.