A method for searching information and displaying search results is disclosed. The method receives one or more keywords, and obtains search results according to the one or more keywords. The search results include one or more documents. The method further confirms at least one cluster name according to the search results, and clusters each of the one or more documents in the search results into a corresponding cluster name. In addition, the method classifies each document in the search results into a corresponding field, and thus obtains classified search results. Finally, the method generates a cluster diagram according to the at least one cluster name and the clustered documents, generates a cluster-classification diagram according to the classified search results and the generated cluster diagram, and outputs the generated cluster-classification diagram.