The techniques of disturbing on IR and MMW guidance have some shortcomings, such as too short of disturbing time, not wide enough of disturbing range, their severe pollution etc. In order to overcome these shortcomings, a new technique of disturbing was put forward. It is based on a special smoke screen with foams. Its disturbing mechanism, the special prescription and the special process of reaction were studied. And a special equipment was manufactured. The results of tests show that the special foam screen can disturb IR and MMW and the visible light, and its disturbing time can be more than 10 minutes at least. The hangover of this foam screen has no pollution to environment.