An image forming apparatus capable of printing out a web page displayed on an host apparatus. An image forming apparatus includes a sheet-supplying cassette to store a printable medium thereon, an input key to input a command for printing out the web page, an interface to transmit the command for printing out the web page to the host apparatus, and receive print data converted to fit onto the printable medium stored on the sheet-supplying cassette from the host apparatus if the input key is selected, and an image forming unit to print out the received print data on the printable medium. Therefore, a user can conveniently prints the web page.