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Abstract X-ray fluorescence sprectrum signal include the continuum. XRF analysis the components of material by the amplitude of peaks. XRF remove the noise and background. To remove the noise, we apply the smoothing filter. And background removal methods applied such as SNIP, Morphology, Threshold methods. In this paper, we applied Threshold using DWT. Interval threshold method divide the some blocks in particular levels. We propose the method that is divided the particular level. Key Words : Spectroscopy, DWT, Threshold, Background Removal   2007       ,     . * Corrsponding Author : Dong Sun Park Tel: +82-63-270-2465 email: ykahoony@jbnu.ac.kr  12 04 02  12 05 02  12 05 10 1.    RoHS            2003 2 WEEE(Waste Electrical and Electronic Equipment)    2006 7 1 .[1] RoHS(Restriction of the use of Hazardous Substances in EEE) 6 (Cd, Pb, Hg, PBB, PBDE, Cr 6+)   , ,      .    ‧  IT   , ,       . RoHS        ‧   ,   (AAS) (ICP-AES)  .[2]          ,               .[3]

X-ray fluorescence spectrum of the block algorithm to apply the interval threshold method using DWT