The state and trend of digital cooled infrared focal plane array detector assembly in USA, Israel and France were presented. According to the work mode of digital Read Out Integrated Circuit(ROIC), recent research results on digital cooled infrared focal plane array detector assembly in USA, Israel and France were introduced. By the concept of SWaP, some kinds of small pixel, HOT performance, digital output, million pixels mid-wave infrared focal plane array assembly were developed in Israel and France. At last the research result on digital cooled infrared focal plane array detector assembly in Kunming Institute of Physics was briefly introduced. The key technology of column-level ADC ROIC had been broken through, and the 640×512(15, 20, 25 μm pitch)column-level ADC digital cooled infrared focal plane array detector assemblies were developed. The performance measures of the digital detector in Kunming institute of physics were comparative with the digital detectors abroad.