A radiography and radiotherapy apparatus, comprising: a body unit; a gantry configured to rotate relative to the body unit; a treatment table on which an object is placed and configured to slide into holes formed in the body unit and the gantry and move in a vertical direction; a gantry driving part configured to rotate the gantry; a radiation irradiation part mounted on the gantry and configured to irradiate radiation toward the object; an image detector mounted to face the radiation irradiation part on the gantry and configured to detect the radiation irradiated from the radiation irradiation part; and a beam stopper provided at a lower end of the image detector and configured to block the radiation, wherein the radiation irradiation part comprises: a single radiation source configured to generate the radiation of energy levels for radiotherapy; a primary collimator configured to shield the radiation generated from the radiation source and determine a beam dispersion angle; a variable filter part configured to adjust an intensity of the radiation from the primary collimator; an ion chamber configured to monitor a dose of the radiation from the variable filter part; and a multi-leaf collimator configured to adjust a distribution of the dose of the radiation from the ion chamber, wherein the variable filter part adjusts an intensity of the radiation irradiated from the single radiation source to obtain a radiation dose suitable for both radiography of energy levels in a range of 10 to 100kV and radiotherapy of energy levels in a range of 100 to 500kV, and wherein the treatment table comprises a rotary table provided at an end of the treatment table and detachably fastened thereto. a body unit; a gantry configured to rotate relative to the body unit; a treatment table on which an object is placed and configured to slide into holes formed in the body unit and the gantry and move in a vertical direction; a gantry driving part configured to rotate the gantry; a radiation irradiation part mounted on the gantry and configured to irradiate radiation toward the object; an image detector mounted to face the radiation irradiation part on the gantry and configured to detect the radiation irradiated from the radiation irradiation part; and a beam stopper provided at a lower end of the image detector and configured to block the radiation, wherein the radiation irradiation part comprises: a single radiation source configured to generate the radiation of energy levels for radiotherapy; a primary collimator configured to shield the radiation generated from the radiation source and determine a beam dispersion angle; a variable filter part configured to adjust an intensity of the radiation from the primary collimator; an ion chamber configured to monitor a dose of the radiation from the variable filter part; and a multi-leaf collimator configured to adjust a distribution of the dose of the radiation from the ion chamber, wherein the variable filter part adjusts an intensity of the radiation irradiated from the single radiation source to obtain a radiation dose suitable for both radiography of energy levels in a range of 10 to 100kV and radiotherapy of energy levels in a range of 100 to 500kV, and wherein the treatment table comprises a rotary table provided at an end of the treatment table and detachably fastened thereto. a single radiation source configured to generate the radiation of energy levels for radiotherapy; a primary collimator configured to shield the radiation generated from the radiation source and determine a beam dispersion angle; a variable filter part configured to adjust an intensity of the radiation from the primary collimator; an ion chamber configured to monitor a dose of the radiation from the variable filter part; and a multi-leaf collimator configured to adjust a distribution of the dose of the radiation from the ion chamber, wherein the variable filter part adjusts an intensity of the radiation irradiated from the single radiation source to obtain a radiation dose suitable for both radiography of energy levels in a range of 10 to 100kV and radiotherapy of energy levels in a range of 100 to 500kV, and wherein the treatment table comprises a rotary table provided at an end of the treatment table and detachably fastened thereto.