The present invention is to provide a packaging material having a radio frequency identification (RFID) function and a bag structure using the same, wherein the packaging material comprises a surface material having an inner surface covered with a metal layer (such as aluminum foil), the metal layer has a slot with a width considerably smaller than a length thereof, and two longer side edges of the slot are connected to two feed-in ends of a radio frequency identification (RFID) chip, respectively, so as to form a slot antenna on the metal layer and enable the RFID chip to receive signals of electro-magnetic waves through the slot antenna. Therefore, the packaging material having the RFID function can be easily and speedily manufactured by forming the slot on the metal layer and installing the RFID chip to the corresponding positions of the metal layer.