A radiographic device comprising: a radiation irradiator configured to radiate radiation onto an irradiation target object and including a plurality of collimators (210, 220, 230, 240) configured to selectively block a flux of the radiation; an image acquisition unit acquiring an image signal by receiving the radiation penetrating the irradiation target object; a display unit displaying a radiographic image based on the image signal; and a determination controller configured to control the radiation irradiator such that an irradiation range of the radiation corresponding to a selection area selected in the radiographic image is implemented, characterised in that wherein the plurality of collimators (210, 220, 230, 240) is provided to be simultaneously driven while the plurality of collimators (210, 220, 230, 240) moves asymmetrically with each other to block at least a portion of the flux of the radiation, wherein the display unit include an input display which displays a first radiographic image for inputting the selection area and a main display which displays a second radiographic image captured and acquired under conditions corresponding to the selection area, wherein the determination controller is further configured to: control the input display to display a basic selection area having a set size and a set shape, such as, a rectangular or circular shape, corresponding to a specific point, when a user taps and touches the specific point on the first radiographic image displayed on the input display, adjust the size and shape of the displayed basic selection area and set an adjustment selection area when the displayed basic selection area is touched and dragged, set the adjustment selection area as a final selection area, when a double tap touch is input, and control the image acquisition unit to capture an image of the final selection area, when a press touch within a certain time range is input. a radiation irradiator configured to radiate radiation onto an irradiation target object and including a plurality of collimators (210, 220, 230, 240) configured to selectively block a flux of the radiation; an image acquisition unit acquiring an image signal by receiving the radiation penetrating the irradiation target object; a display unit displaying a radiographic image based on the image signal; and a determination controller configured to control the radiation irradiator such that an irradiation range of the radiation corresponding to a selection area selected in the radiographic image is implemented, characterised in that wherein the plurality of collimators (210, 220, 230, 240) is provided to be simultaneously driven while the plurality of collimators (210, 220, 230, 240) moves asymmetrically with each other to block at least a portion of the flux of the radiation, wherein the display unit include an input display which displays a first radiographic image for inputting the selection area and a main display which displays a second radiographic image captured and acquired under conditions corresponding to the selection area, wherein the determination controller is further configured to: control the input display to display a basic selection area having a set size and a set shape, such as, a rectangular or circular shape, corresponding to a specific point, when a user taps and touches the specific point on the first radiographic image displayed on the input display, adjust the size and shape of the displayed basic selection area and set an adjustment selection area when the displayed basic selection area is touched and dragged, set the adjustment selection area as a final selection area, when a double tap touch is input, and control the image acquisition unit to capture an image of the final selection area, when a press touch within a certain time range is input. control the input display to display a basic selection area having a set size and a set shape, such as, a rectangular or circular shape, corresponding to a specific point, when a user taps and touches the specific point on the first radiographic image displayed on the input display, adjust the size and shape of the displayed basic selection area and set an adjustment selection area when the displayed basic selection area is touched and dragged, set the adjustment selection area as a final selection area, when a double tap touch is input, and control the image acquisition unit to capture an image of the final selection area, when a press touch within a certain time range is input.