Ce:YAG crystal is an important kind of scintillation crystals. Compared with other inorganic scintillators, Ce:YAG crystal holds a high luminous efficiency and a wide light pulse. Especially, its emission peak is 550nm, which well matched with the sensitivity detect wavelength of the silicon photodiode detection. Thus, it is very suitable for the scintillators of the equipments that taken the photodiode as detectors and the scintillators to detect the light charged particles. At this time, a high coupling efficiency can be achieved. Furthermore, Ce:YAG can also be commonly used as a phosphor in cathode ray tubes and white light-emitting diodes.