中文摘要：

随着网络空间的拓展、网络应用模式的发展及大数据时代的到来,面向网络空间的下一代搜索引擎——＂大搜索＂已具有迫切的需求。阐述了网络空间大搜索的内涵及其特点,提出了大搜索的研究范畴,包括泛在网络空间信息获取与发掘、知识仓库构建和管理、用户搜索意图准确理解与表示、用户意图高效匹配和推演、大搜索安全可信与隐私保护等方面的内容,并针对上述问题,指出了具有5S特性的网络空间大搜索技术的发展趋势。

英文摘要：

With the expansion of cyberspace, the development of Web application and the arrival of the era of big data,searching for the cyberspace has become an urgent requirement. The concept ＂cyberspace big search＂ was proposed and its basic features was discussed. Based on these features, the architecture for the big search was proposed, including five parts： acquiring and mining information from the cyberspace, constructing and managing knowledge wares,understanding and representing the user＇s search intention, matching and reasoning the search intention, security and privacy in big search. The research progress and trend of cyberspace big search are summarized.