Abstract: With rapid development of mobile terminal equipment and the Internet, people's lives are increasingly dependent on the Internet and mobile terminal equipment. In order to protect the commercial secrets of enterprises and the privacy of users, the access control of the picture is limited and the unauthorized user is automatically destroyed in a certain period of time to protect the sender's privacy. Based on the application of mobile Internet client-server system, this technology limits users to only download a photo once, so as to constantly replace an existing photo. The handler mechanism based on Android is used to display photos in a period. At the same time, the recipient can see the received photo which cannot be controlled. As above, the privacy of sender can be protected.