Abstract: Passive gas infrared imaging detection technology has become an important method for oil and natural gas leakage detection due to its high detection efficiency, intuitive visualization and no need for laser illumination. Based on the infrared imaging detection principle of alkane gas leakage such as oil and natural gas. The representative detectors and gas leakage infrared imaging detection systems at foreign and domestic were focused, and its technical characteristics and some key technologies in the imaging system were analyzed. The development status of gas detection system performance evaluation technology was comprehensively summarized, which played an important role in promoting the application of gas detection technology and improving system performance. Finally, the development direction and existing problems of infrared gas imaging detection technology for alkane gas leakage were analyzed.