The present disclosure provides an information search method and system applicable in an information search system wherein each document has corresponding forward index data to address the issue of low search efficiency suffered by existing information search techniques. In one aspect, the method may include: receiving an inquiry word and obtaining one or more keywords contained in the inquiry word by segmentation; searching one or more documents matching the one or more keywords and forward index data corresponding to the one or more documents through the information search system's inverted index data; and determining an abstract of each of the one or more documents according to a corresponding document's forward index data, and outputting the abstract and information of the one or more documents as a search result. The proposed techniques can increase efficiency of information search and, at the meantime, guarantee accuracy of the search to a certain extent.