A radiography system, comprising: a ray source (110; 130-1,130-2; 430-1,430-2,431-1,431-2) comprising a plurality of X-ray generators which are distributed on one or more planes intersected with a moving direction of an object being inspected; a detector module (150; 150-1,150-2) comprising a plurality of detection units and configured to receive X-rays transmitting through the object being inspected; a data collection circuit coupled to the detector module (150; 150-1,150-2) and configured to convert a signal generated by the detector module into detection data; a controller connected to the ray source (110; 130-1,130-2; 430-1,430-2,431-1,431-2), the detector module (150; 150-1,150-2) and the data collection circuit, and configured to control at least two X-ray generators of the plurality of X-ray generators to generate X-rays alternately such that the object is scanned by the generated X-rays as the object is moving along the moving direction, and control the detector module and the data collection circuit to respectively obtain detection data corresponding to the at least two X-ray generators; and a data processing computer configured to create images of the object being inspected in viewing angles of the at least two X-ray generators based on the detection data, wherein the ray source is configured to implement pulse-type emitting so as to emit X-rays only within a sampling period of the detector module and stop emitting X-rays outside the sampling period of the detector module; and wherein the detector module is configured to detect rays from different X-ray generators in the ray source, and in each collection process, rays emitted from only one X-ray generator are collected by the detector module, characterized in that the radiography system further comprises an object border detection apparatus configured to detect the object border of the object before the object passes through a scan plane, wherein the X-ray generators are selected according to the detected object border such that the generated X-ray covers the target object completely. a ray source (110; 130-1,130-2; 430-1,430-2,431-1,431-2) comprising a plurality of X-ray generators which are distributed on one or more planes intersected with a moving direction of an object being inspected; a detector module (150; 150-1,150-2) comprising a plurality of detection units and configured to receive X-rays transmitting through the object being inspected; a data collection circuit coupled to the detector module (150; 150-1,150-2) and configured to convert a signal generated by the detector module into detection data; a controller connected to the ray source (110; 130-1,130-2; 430-1,430-2,431-1,431-2), the detector module (150; 150-1,150-2) and the data collection circuit, and configured to control at least two X-ray generators of the plurality of X-ray generators to generate X-rays alternately such that the object is scanned by the generated X-rays as the object is moving along the moving direction, and control the detector module and the data collection circuit to respectively obtain detection data corresponding to the at least two X-ray generators; and a data processing computer configured to create images of the object being inspected in viewing angles of the at least two X-ray generators based on the detection data, wherein the ray source is configured to implement pulse-type emitting so as to emit X-rays only within a sampling period of the detector module and stop emitting X-rays outside the sampling period of the detector module; and wherein the detector module is configured to detect rays from different X-ray generators in the ray source, and in each collection process, rays emitted from only one X-ray generator are collected by the detector module, characterized in that the radiography system further comprises an object border detection apparatus configured to detect the object border of the object before the object passes through a scan plane, wherein the X-ray generators are selected according to the detected object border such that the generated X-ray covers the target object completely.