Pyroelectric detectors， a typical type of uncooled infrared detectors， are widely used in fields such as flame and fire warning， moving target sensing， gas detection， temperature measurement， and even terahertz detection， owing to their high sensitivity， fast response speed， low power consumption， and broad spectral response. Beyond conventional applications， pyroelectric detectors offer irreplaceable advantages in several specialized scenarios， including laser parameter measurement， high-precision spectrometers， spectral response calibration for infrared detectors， as well as applications in space science such as infrared earth sensors and Earth radiation budget measurement. However， in the compelling field of infrared imaging， pyroelectric detectors indeed lose the competition against bolometers， which are another important type of uncooled infrared detector. The review summarizes the intrinsic technical challenges faced by traditional pyroelectric detectors in imaging applications， including difficulties in integration with readout circuits， the requirement for a chopper， and the limitations in miniaturizing pixel size. This article summarizes two technical solutions that can address the difficulties of traditional pyroelectric detectors in infrared imaging： the thermal reset mode and the active detection mode. Through technological development and iteration， pyroelectric focal plane array devices are expected to achieve higher sensitivity and lower cost， securing a place in the application field of infrared imaging technology.