An imaging method for computed tomographic system, the computed tomographic system comprising an X-ray tube configured to convert electrical energy into X-rays and emit the X-rays, a filter module arranged in a light path of the X-rays and having the ability of adjusting a penetrability of the X-rays via controlling a plurality of filter mirrors to adjust energy intensity of the X-rays, an image detector arranged in the light path of the X-rays, and a memory module, the memory module being configured to store a plurality of pre-stored two-dimensional X-ray images respectively corresponding to a plurality of different template data, the template data comprises a template application and a template body type, the imaging method comprising following steps: a) controlling a computed tomographic system to display a plurality of application options and a plurality of options of body type under an intelligent imaging mode; b) receiving a description operation for selecting one of the application options and one of the body type options; c) configuring an input application of the description data according to the selected application option, and configuring an input body type of the description data according to the selected body type option; characterized in that d) selecting one of pre-stored two-dimensional X-ray images respectively corresponding to a plurality of different template data according to the description data, and displaying the selected pre-stored two-dimensional X-ray image, wherein the template data corresponding to the selected pre-stored two-dimensional X-ray image is consistent with the description data; e) after the step d), recognizing the template data comprising the template application matching with the input application and the template body type matching with the input body type, and selecting one of a plurality of imaging parameter sets corresponding to one of the plurality of different template data, wherein the template data corresponding to the selected imaging parameter set is consistent with the description data, each of the imaging parameter sets is used to maximize a contrast-to-noise ratio of the three-dimensional imaging data being consistent with the corresponding template data, each of the imaging parameter sets comprises at least two of a X-ray tube voltage, a filter parameter, and a projection number; and f) controlling the X-ray tube, the filter module and the image detector of the computed tomographic system to execute a three-dimensional imaging operation according to the selected imaging parameter set for obtaining the three-dimensional imaging data being consistent with the description data. a) controlling a computed tomographic system to display a plurality of application options and a plurality of options of body type under an intelligent imaging mode; b) receiving a description operation for selecting one of the application options and one of the body type options; c) configuring an input application of the description data according to the selected application option, and configuring an input body type of the description data according to the selected body type option; characterized in that d) selecting one of pre-stored two-dimensional X-ray images respectively corresponding to a plurality of different template data according to the description data, and displaying the selected pre-stored two-dimensional X-ray image, wherein the template data corresponding to the selected pre-stored two-dimensional X-ray image is consistent with the description data; e) after the step d), recognizing the template data comprising the template application matching with the input application and the template body type matching with the input body type, and selecting one of a plurality of imaging parameter sets corresponding to one of the plurality of different template data, wherein the template data corresponding to the selected imaging parameter set is consistent with the description data, each of the imaging parameter sets is used to maximize a contrast-to-noise ratio of the three-dimensional imaging data being consistent with the corresponding template data, each of the imaging parameter sets comprises at least two of a X-ray tube voltage, a filter parameter, and a projection number; and f) controlling the X-ray tube, the filter module and the image detector of the computed tomographic system to execute a three-dimensional imaging operation according to the selected imaging parameter set for obtaining the three-dimensional imaging data being consistent with the description data.