The invention relates to an SAR sequential image based scene change detecting method and device and is used for solving problems of comparatively large errors in change detection of two images in theprior art. The method includes acquiring a first sequential image sequence of a first to-be-detected image and a second sequential image sequence of a second to-be-detected image; acquiring a first sequence average image and a second sequence average image based on the first sequential image sequence and the second sequential image sequence; registering the first sequence average image and the second sequence average image; performing scene change detection on the first sequential image sequence and the second sequential image sequence subjected to registering. The method provided by the invention improves image scene change detecting precision.