Irradiation apparatus and irradiation method using same

A radiation irradiating device, comprising:

• a radiation source;
• a target plate having an irradiation hole through which radiation emitted from the radiation source passes, and having a first target stopper and a second target stopper formed to protrude on both surfaces, respectively;
• X-axis shield plates coupled to both sides in a lateral direction of one surface of the target plate, having an X-axis shield stopper formed on a contact surface with the target plate, and capable of being laterally moved with respect to the target plate;
• and
• Y-axis shield plates coupled to both sides in a longitudinal direction of the other surface of the target plate, having a Y-axis shield stopper formed on a contact surface with the target plate, and capable of being longitudinally moved with respect to the target plate,
• wherein the X-axis shield stopper is capable of being moved between two first target stoppers adjacent to each other, and
• wherein the Y-axis shield stopper is capable of being moved between two second target stoppers adjacent to each other.