A method for printing a document of a mobile terminal without a separate printer setup is provided. The method includes performing a wireless auto-connection between a mobile terminal and a printer located near the mobile terminal, and when the mobile terminal transmits a document to be printed to the printer, the printer finds a computer capable of outputting the document, transmits the document to the computer, and prints the document in response to a print instruction received from the computer. Accordingly, a user can print various documents stored in the mobile terminal wherever a printer is located, even without information of the printer.