Abstract: Starting from the showcase demand of video resources in the Internet-based Communication Platform of the Chinese Academy Sciences,this paper proposes a solution of a video conversion middleware based on multi-application service model.The authors develop a focused introduction to technology architecture and system processes of "video conversion middleware",and a detailed description of the design and the main algorithms of the system functional modules.This paper argues that the implementation of the "video conversion middleware" can effectively improve the reusability of the system,and achieve the integration of video resources in the site group in an efficacious way.It improves the performance of the external services of the website group.