In order to progress the millings toward the advance technologies, authors has investigated the visualization methods in milling procedure and optimized its operations. From the wet ball milling experiments for some ceramics materials, we have obtained results as follows, 1） it is able to detect their specific surface area changes by the relaxation time measurements according to the in situ analysis with pulse proton NMR, 2） measured data shows the milling efficiency in several steps, and 3） we can make use of these dynamic changes as the operation control fundamentals. Therefore, we recognized the possibilities of making advances on the milling process and developing its control systems.
