X-rays have attracted a lot of attention as a form of electromagnetic radiation that enable us to see objects through materials. And they are also a great contributor to clacification of physical phenomena. In the field of analysis, X-rays have drawn attention from their initial stage as a method of non-destructive simultaneous anaysis. Scientific measurement using X-rays is supported by three elemental technologies; generation of X-rays, spectroscopy and detection. Recent years, we have seen further advancement in those technologies. I am going to explain the present status and the future of advanced scientific measurement obtained by combinations with those evolving elemental technologies.