In a communication system, an image forming apparatus sends an address of a receiving section to a mobile terminal. The mobile terminal receives a selection of an image data among plural thumbnails displayed on a display section, and wirelessly sends the selected image data to the image forming apparatus with the address. The image forming apparatus receives the selected image data sent with the address by the mobile terminal, and prints an image based on the selected image data. A communication between the mobile terminal and the image forming apparatus is performed wirelessly with an IEEE 802.11 standard. The image forming apparatus continuously performs a second printing, when the receiving section receives a selected image data again in a condition that the communication with the mobile terminal is continuously established by the receiving section after the printing of the received image data is finished.