With the development ofmilitary technology, the level of demand, to infrared detector in the field of scout,control and guide, is more and more high. Now, infrared detector has attained Ⅲ generation——infrared focal plane arrays. In this paper, the conceptionof staring infrared focal plane arrays is discussed, as well its advantages of militaryapplication, comparing with the mechanical scanning system, for example, improving heatsensitivity and SNR, compact structure of detector, and a batch of production, easy toprocess signals. According to the situation about SFPA of each wavelength, some advicesabout how to use current technology to develop this system are given.