A system includes radiation source, scanning vehicle, control vehicle and remote control device for two vehicles. The rotary platform which can carry on relative motion is equipped on the scanning vehicle as parallelogram support built by fourlink mechanism of pin joint and level as well as vertical cantilevers connected with the support with detector are equipped on the rotary platform. The generator, work-chamber and rotary platform with the radiation source under its tail part are disposed at front and back parts of vehicle universal chassis separately. The sector formed by X ray from the radiation source is passed through low level position of container to be checked at back of tail part of the universal chassis.