An X-ray imaging device, the device comprising: an X-ray radiation unit configured to radiate X-rays to predetermined target areas of an object (A, OB) to be imaged in respective imaging positions; an X-ray sensing unit configured to receive the X-rays that have passed through the target areas in the respective imaging positions and form X-ray projection data of the target areas; and a movement unit configured to arrange the X-ray radiation unit and the X-ray sensing unit to allow the X-ray radiation unit and the X-ray sensing unit to face each other with the object located therebetween in each of the imaging positions by rotating at least one of the X-ray radiation unit and the X-ray sensing unit based on a variable rotary shaft, during a single imaging operation wherein an image information is obtained by radiating the X-rays to all the target areas of the object; wherein the X-ray imaging device further comprises: a position information provision unit configured to provide a position information of the target areas in the respective imaging positions, a position information of the variable rotary shaft, and a position information of the X-ray radiation unit and the X-ray sensing unit, wherein at least a part of a first target area in a previous imaging position is irradiated in an overlapping manner with the X-rays radiated to a second target area in a next imaging position, during the single imaging operation; a control unit configured to control the X-ray radiation unit, the X-ray sensing unit, and the movement unit based on the position information of the target areas in the respective imaging positions and the position information of the X-ray radiation unit and the X-ray sensing unit; and an image processing unit configured to form a three-dimensional image of the object from the projection data obtained during the single imaging operation, wherein a size of each of the target areas is smaller than one-half of a projected size of the object, characterised in that the image processing unit is configured to form the three-dimensional image of the object by compensating the overlapping portions of the X-rays depending on X-ray directions. an X-ray radiation unit configured to radiate X-rays to predetermined target areas of an object (A, OB) to be imaged in respective imaging positions; an X-ray sensing unit configured to receive the X-rays that have passed through the target areas in the respective imaging positions and form X-ray projection data of the target areas; and a movement unit configured to arrange the X-ray radiation unit and the X-ray sensing unit to allow the X-ray radiation unit and the X-ray sensing unit to face each other with the object located therebetween in each of the imaging positions by rotating at least one of the X-ray radiation unit and the X-ray sensing unit based on a variable rotary shaft, during a single imaging operation wherein an image information is obtained by radiating the X-rays to all the target areas of the object; wherein the X-ray imaging device further comprises: a position information provision unit configured to provide a position information of the target areas in the respective imaging positions, a position information of the variable rotary shaft, and a position information of the X-ray radiation unit and the X-ray sensing unit, wherein at least a part of a first target area in a previous imaging position is irradiated in an overlapping manner with the X-rays radiated to a second target area in a next imaging position, during the single imaging operation; a control unit configured to control the X-ray radiation unit, the X-ray sensing unit, and the movement unit based on the position information of the target areas in the respective imaging positions and the position information of the X-ray radiation unit and the X-ray sensing unit; and an image processing unit configured to form a three-dimensional image of the object from the projection data obtained during the single imaging operation, wherein a size of each of the target areas is smaller than one-half of a projected size of the object, characterised in that the image processing unit is configured to form the three-dimensional image of the object by compensating the overlapping portions of the X-rays depending on X-ray directions. a position information provision unit configured to provide a position information of the target areas in the respective imaging positions, a position information of the variable rotary shaft, and a position information of the X-ray radiation unit and the X-ray sensing unit, wherein at least a part of a first target area in a previous imaging position is irradiated in an overlapping manner with the X-rays radiated to a second target area in a next imaging position, during the single imaging operation; a control unit configured to control the X-ray radiation unit, the X-ray sensing unit, and the movement unit based on the position information of the target areas in the respective imaging positions and the position information of the X-ray radiation unit and the X-ray sensing unit; and an image processing unit configured to form a three-dimensional image of the object from the projection data obtained during the single imaging operation, wherein a size of each of the target areas is smaller than one-half of a projected size of the object, characterised in that the image processing unit is configured to form the three-dimensional image of the object by compensating the overlapping portions of the X-rays depending on X-ray directions.