In our work, X-ray computed tomography (X-CT) was used as the main research measures to interpret the structure of a cloisonné enamel ware with an inscription of “Jingtai” from the Palace Museum. In combination with the results of X-ray fluorescence and Raman spectrometry, it is found that each part of the enamel ware came from different relics. The thickness and color of the glaze layer, the structure relationship and elemental compositions all point to a later-remade object, confirming what experts have previously deduced from visual inspections.