Door regulating apparatus of vehicle and method of controlling the same

A door regulation apparatus that positions a door mounted in a freely rotatably state in a vehicle body at a reference position in a gap/step measuring process and that makes a step of a predetermined portion of the door to zero, the door regulation apparatus comprising:

• a frame installed outside of a vehicle body transfer line;
• a moving member installed to reciprocate forward and backward in the frame powered by a driving unit based on the door;
• a clamping unit installed in the moving member that vacuum clamps to a skin surface of the door;
• a sensor installed in the clamping unit and that senses a vacuum pressure operating at the skin surface of the door;
• a vision photographing unit installed in the moving member that photographs a predetermined portion of the door;
• and
• a control unit that analyzes and processes a sensing signal that receives from the sensor and vision data that acquires from the vision photographing unit to control the driving unit.