Infrared spectrum is very useful in the field of hyperspectral remote sensing. Because of the weak energy of infrared spectrum, the difficulty of the development of infrared focal plane, and the strong background, the development of the Infrared Hyperspectral Imaging System is very difficult. So far, the field is still in the laboratory research stage. This paper presents an airborne infrared hyperspectral imager. It can acquires 180 wavebands in the range of 8.0~12.5 μm.The spectral resolution of this imager is better than 44 nm and the absolute spectral calibration accuracy is better than 1 nm. The field of view of this imager is about 14° and the spatial resolution is better than 1mrad. Its noise equivalent temperature difference (NETD) is less than 0.2 K@300 K. The imager was carried out in Zhoushan, Zhejiang, China in June 2015. Analysis shows that the infrared hyperspectral image data can plays an important role in the field of surface emissivity inversion and geological mineral recognition.