Abstract: A server device is provided. The server device includes a communicator configured to receive a query request from an external electronic device, a storage configured to store information related with the query, and at least one processor configured to search for relation information related with the query of the query request based on the query request within an ontology which is generated by using data stored in a database, automatically select at least one keyword in the relation information list, and control the communicator to transmit the selected at least one keyword to the external electronic device.

Abstract: An electronic device, a search server, and a data search method are provided herein. The search server includes a communication device configured to receive a plurality of indices for setting a search item. The search server also includes a memory configured to store an index map in which link relations among a plurality of indices are defined. The search server further includes a controller configured to detect at least one path, including the plurality of received indices, using the index map and to set the search item according to the at least one detected path.