PFM has the advantages of real color and anti-milled, widely used in restoration of teeth destroyed, teeth incomplete and teeth beauty. However, due to the issue of brittleness of ceramics and its manufacturing technology. the happing lost ceramics. crack inside and interface separate often occur clinically .In this regard, it not only delay the restoration, but also greatly add the expense of restoration. Hence, an inspection method is required to develop. in order to judge whether there is flaw on the PFM teeth cover or inside both before and after restoration. This study will adopt Scanning Acoustic Microscope and X-Ray Microscope Inspection to conduct the Nondestructive testing for PFM restoration. The results showed that the above two methods are both feasible on flaw inspection, Especially, the combination of two methods could effectively inspect the flaw's depth and size on PFM cover or inside, this will provide wide clinical application in the future.