In order to understand deformation / fracture characteristics, many measurement methods have been proposed and developed. Almost all methods, however, have been limited on the surface indirectly due to insufficient resolution. Recently, third-generation synchrotron radiation facilities have enabled observations with high resolution. Therefore, the 3D mapping of structural features like air bubbles (pores) have been attempted to understand local deformation / fracture characteristics in some materials using the X-ray computed tomography (CT). However, there are some issues and one of them is long processing time. In this paper, we propose a system which can measure a 3D, local, high-accuracy deformation / fracture characteristic by obtaining the strain distribution. Experiments have proved its effectiveness.