Image processing system and mobile terminal device

An image processing system comprising a plurality of image forming apparatuses and a mobile terminal device connected to each of the image forming apparatuses via a network,

• each of the image forming apparatuses including:
• a first network communication unit that performs data communication with the mobile terminal device via the network,
• a first near field communication unit that performs near field communication with the mobile terminal device;
• an image forming unit that forms an image on a recording sheet;
• and
• a first controller that causes the image forming unit to form, on the recording sheet, an image shown by image data transmitted from the mobile terminal device and been received by the first network communication unit, and
• the mobile terminal device including:
• a display unit;
• an operation unit that accepts input of an instruction from a user;
• a second network communication unit that performs data communication with each of the image forming apparatuses via the network;
• a second near field communication unit that performs near field communication with the first near field communication unit of each of the image forming apparatuses;
• and
• a second controller that:
• when the second near field communication unit receives respective wireless signals transmitted from each of the image forming apparatuses, detects a position and a direction of each of the image forming apparatuses relative to the mobile terminal device on a basis of each of the wireless signals and causes the display unit to display the positions and the directions;
• and when the operation unit accepts an instruction to select a first one of the image forming apparatuses, causes the second network communication unit to transmit image data to be printed and a print execution request to the first one of the image forming apparatuses selected by the instruction.