In this paper, the principles and method for building a microimage computer aided retrieval system are discussed, and specially with the emphasis on the problems of system structure design, microform processing, formation of bibliographic database, system starting routine. 讨论了实现缩微影像计算机辅助检索的原理、方法,以及在系统规划、缩微拍摄及计算机建库、系统启动程序的设计等方面的若干技术问题;