Abstract:  In traditional multimedia conference and teaching,presenter and teacher could only share message to
listener. In order to solve this single shared problem, we design a picture shared system based on embedded system,
Android system and iOS system. The system is divided into mobile terminal, Linux embedded system and server three
partitions. The mobile terminal compresses multimedia picture, and then uploads it to server with the form of stream.
The embedded system reverts the stream to pictures and shows on it’s projector screen. Real-time refresh shared
images, and new shared images overwrite previously shared images. Server saves all the pictures into database, so all
the mobile terminals could review or save them. The results show that real-time sharing of different pictures can be
realized on the embedded platform, and the real-time sharing of multimedia file information is solved.

Key words: Linux system, multi-threaded network,  multimedia communication, mobile terminal