1. A system for search comprising: a preliminary data analysis part configured to analyze input images to extract a variety of attributes, analyze a trend about a category of information requested by a client by using the variety of extracted attributes, and store the trend analysis as metadata; an index part configured to make the metadata searchable by structuralizing and storing the metadata; and a search part configured to extract trend information matching the category of information requested by the client from the searchable metadata and provide the trend information in a predetermined format.