Abstract: The infrared thermographic nondestructive equipment based on flash thermal excitation device was introduced. The system adopts the independent development of uncooled infrared thermal imager, the lamp symmetrical arrangement and reflective shade design makes the uniformity of the flash energy increase,the signal-to-noise ratio of infrared image is improved by infrared image denoising and data reconstruction. Independent thermal excitation power supply includes a variety of pulse width control method. The control software of the system can perform thermal wave image acquisition and digital processing to enhance image quality, and the interface adopts touch screen control,which is portable and compact.The system facilitates the detection of in-service and in-situ.