This paper studies a new kind of intelligent detecting technology which includes key detectable matterelements distilling, adaptive degree analyzes, focusing and reasoning mechanism construction, focusing processing. This paper researches on the focusing and reasoning mechanism construction, which is to construct the reasoning mechanism and use it to get the focusing. The focusing is actually to work out the core element of the detectable matter-element according to the adaptive degree

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... ing. This paper puts forward the methods to solve all types of focusing: to the one-dimensional and two-dimensional focusing, connects the adaptive degree with the dependent function to figure out the focusing; to the threedimensional and multidimensional focusing, constructs an extension fuzzy -based knowledge reasoning expert system and uses the extension reasoning and fuzzy rules to work out the focus.