A moveable catenary system for carrying a container using an electric container freight train includes: a main rail track disposed beside a freight platform; a plurality of catenary masts disposed beside the main rail track; fixed support units fixedly coupled in a cantilever shape to the catenary masts, respectively, with the exception of the catenary masts corresponding to the freight platform; vertical driving support units coupled in the cantilever shape to the catenary masts corresponding to the freight platform so as to vertically rotate the catenary masts, respectively; a fixed catenary coupled to the fixed support units such that positions at which the vertical driving support units are disposed are cut and the vertical driving support units are disposed inside and along the main rail track; a moveable catenary connected to the vertical driving support unit, the movable catenary being circularly moved in a vertical direction according to the vertical rotation of the vertical driving support units; and switching units connecting the moveable catenary to the fixed catenary when the vertical driving support units are disposed in a horizontal direction. According to the present invention, freight cars of the electric container freight train may be moved beside the freight platform to reduce the time required for loading containers into the freight cars of the electric container freight train or unloading containers mounted on the freight cars. Furthermore, the rail track may be simply arranged.