Abstract: Cloud computing is a method of calculation which provides users with the computing capacity, storage capacity and service capabilities, according to need and the final purpose is user-friendly and greatly reduces the user's hardware and software procurement costs. Cloud computing forensics is a new battlefield, in order to better combat cybercrime in the battlefield, you must come up with some novel methods of investigation. Static electronic evidence, dynamic web-based electronic evidence, the cloud environment of electronic forensics related concepts, key technologies, etc. are reviewed and the key technologies of the electronic evidence collection model in cloud computing environments are discussed. I}hat cloud computing mode of thinking is proposed. It points out the cloud forensics technology development trends.

Key words: Cloud computing, Electronic evidence, Cloud forensics