A combined movable low target point container detection system relates to radiation scanning image detection technological field. A revolving platform on the chassis rotates by 90deg. a portal frame is formed by a parallelogram frame, a horizontal arm and a vertical arm to cross over the tested container and to move in parallel according to the signal emitted by a remote control device. The sliding platform of the back of the revolving platform moves downward to lower the ray target points emitted by the radiation source, the calibrator and the collimator. After the low position formed by x-ray emitted by the radiation source passes through the tested container and is received by the detector in the arms, it is converted to electrical signal to be output into the image acquired module in the device cabin and finally input into an operation examiner and the remote control computer displays the result.