Video search system and method based on natural interactive import and video search server

The invention relates to the technical field of video search and provides a video search system and a method based on natural interactive import. A client of the video search system receives user import natural interactive imports and provides the imports for the video search server to perform video research; and the video search server can comprise an on-line portion and an off-line portion. The off-line portion performs semantic analysis on collected video information and builds video semantic space and a video relational data base. The on-line portion obtains user text data based on user import natural interactive imports and performs semantic analysis, a video pre-search is performed in the relational data base with semantic analysis results, and a comparison search is performed in semantic description subsets contained in video pre-search results based on the semantic description of semantic analysis results in the video semantic space according to the semantic analysis results so as to output video final search results to the user. The user can obtain relevant videos from the data base rapidly only through providing simple description of video contents, and intelligent sensing of user video target tasks is achieved.