A method and apparatus for outputting data by using information in a radio frequency identification (RFID) tag are provided. The data output method includes: receiving a response signal, including an address of a server having data on at least one or more items, from an RFID tag providing a function for identifying an arbitrary object by using a radio frequency; requesting the server having the data on at least one or more items among the items to provide the data, based on the address of the server included in the response signal; and outputting data corresponding to a response to the request. By doing so, a large amount of data that cannot be stored in an RFID tag due to insufficient memory capacity of the RFID tag can be output to users.