The invention relates to the technical field of urban construction, in particular to an all-weather remote sensing monitoring automatic analysis method and system. The method comprises the following steps: S1, obtaining an original image: obtaining original remote sensing images of a land in different periods; s2, geometric registration: carrying out geometric correction on the remote sensing images by using the ground control point data, and carrying out registration between the images; s3, radiation correction: eliminating or correcting radiation distortion or distorted images in the images, and carrying out normalization processing on the images; s4, performing change detection: performing change detection on the image by using a change detection algorithm based on a convolutional neural network and transfer learning, and generating a change result; and S5, result analysis: analyzing the change result, and carrying out early warning processing on the land use condition. Automatic change detection of images in different periods is realized, the change detection precision is improved, the number of manual intervention times is reduced, and rapid change detection result generation is realized.