Nowadays, the industry requires higher reliability and more precision than existing 2D X-ray of vision base testing technology. So, the needs of internal defects testing technology based on 3D transillumination images is increasing more and more. However, only a few developed countries like USA, Germany, and Japan etc. have the original technology about 3D transillumination image because of very high technology barrier to entry that engineering fileld. Therefore, platform technology development based on 3D transillumination image is necessary for the quality and enhancement of competitive power of parts making industry. In this study, systematization and development of integrated technology in order to check and observe the inner part of manufactured products using CT X-ray without cutting products was performed. Concretely, 1) the localization of principal industrial CT components, 2) the development of a software for high speed processing and analysis of images, 3) the research and development of the building technology of automated integration computed tomography testing machine were implemented. Accordingly, the outline of development technology and research result until now and future direction with some examples will be introdued in this paper.