Integrating Legacy Software Toolkits into China-VO System

Virtual Observatory(VO) is a collection of data-archives and software toolkits. It aims to provide astronomers research resources with uniformed interfaces, using advanced information technologies. In this article, we discuss the necessaries and feasibilities of integrating legacy software toolkits into China-VO system at first;then analyse granularity about integrating. Three general integrating methods are given in detail;At last, we introduce an instance of integrating "Image Magick"-an software for image processing and discuss more about VO integration.