The present disclosure relates to a movable article inspection system comprising: a portal frame and a ray-based inspection assembly. The portal frame comprises: a portal frame, comprising: a transverse beam (1) located at a top of the portal frame; and vertical beams (2) located on opposite sides of the transverse beam (1) and connected with the transverse beam (1); a wheeled travelling device provided at lower ends of the vertical beams (2), for moving the portal frame; and a ray-based inspection assembly for carrying out an inspection of an article passing through the portal frame. With the movement of the wheeled travelling device, the position adjustment and the transition of the inspection assembly are realized. On one hand, there are fewer site restrictions and basically no civil construction for the inspection site, which reduces the pre-construction investment. On the other hand, the wheeled travelling device can achieve a long-distance transition and therefore has better applicability.