Abstract: Nowadays, the digital image editing techniques and tools are widely used in various fields in our society, but the increasing cases of image malicious tampering also show the serious consequences of the easy access to image editing. In order to verify and maintain the authenticity of digital images and prevent the abuse of image editing techniques, digital image forensics are catching more and more attention and becoming a hot topic in multi-media information security. Based on the studies on image operation detection in digital image forensics, this paper briefly reviews the basic ideas of image operation detection at first. Then we introduce the latest researches of the operation trace analysis, traditional hand-crafted features, and deep learning detectors under various forensic scenarios, including single operation detection, general operation detection, and operation chain detection. Finally, the conclusions and discussions are made on the existing challenges and future developments for image operation detection.