A multimodal transportation interworking system, at least comprising: a rail system (1, 30); a cargo vehicle movably disposed on a rail beam of the rail system (1, 30); a transfer apparatus used for transferring a goods loading device from a transportation tool to the cargo vehicle and loading the goods loading device onto the cargo vehicle, or unloading the goods loading device from the cargo vehicle and conveying the goods loading device onto the transportation tool; a processor connected to the cargo vehicle and the transfer apparatus so as to control the transfer apparatus to transfer the goods loading device, and to control the cargo vehicle to move on the rail beam after the goods loading device is secured onto the cargo vehicle; wherein, as the goods loading device needs to be transferred, the transfer apparatus transfers the goods loading device from the transportation tool to the cargo vehicle and loads the goods loading device onto the cargo vehicle, and the processor controls the cargo vehicle to move on the rail beam, or the transfer apparatus unloads the goods loading device from the cargo vehicle and conveys the goods loading device onto the transportation tool; characterised in that each of the cargo vehicles comprises a cargo vehicle bogie being supported at the lower surface of the inner cavity of the rail beams, the cargo vehicle bogie comprising a bogie frame whose front and rear ends are connected with gearboxes respectively, each of the gearboxes being symmetrically provided with two output shafts on left and right sides, a travelling wheel being mounted on each of the output shafts, the cargo vehicle bogie running on the rail beams by four travelling wheels, front and rear ends of two gearboxes being connected to two frame intermediate connections respectively, front and rear ends of the two frame intermediate connections being respectively connected to two traction electric motors which control the cargo vehicle bogie to run, a lower end of the cargo vehicle bogie being connected to a goods loading device integrated spreader via a suspension device after passing through the opening, a lower end of the goods loading device integrated spreader being connected to the goods loading device; the processor is connected to the traction electric motor, wherein the rail system is bilaterally symmetrically mounted with two rail beams, the two rail beams being respectively provided with a plurality of cargo vehicles which are movable thereon, the goods loading device being suspended on a lower end of the plurality of cargo vehicles below the rail beam at each side, wherein the rail beams are of a box-type structure, a lower surface of the rail beams being provided with an opening which extends through from a front end to a rear end thereof, the cargo vehicle being supported at a lower surface of an inner cavity of the rail beams. a rail system (1, 30); a cargo vehicle movably disposed on a rail beam of the rail system (1, 30); a transfer apparatus used for transferring a goods loading device from a transportation tool to the cargo vehicle and loading the goods loading device onto the cargo vehicle, or unloading the goods loading device from the cargo vehicle and conveying the goods loading device onto the transportation tool; a processor connected to the cargo vehicle and the transfer apparatus so as to control the transfer apparatus to transfer the goods loading device, and to control the cargo vehicle to move on the rail beam after the goods loading device is secured onto the cargo vehicle; wherein, as the goods loading device needs to be transferred, the transfer apparatus transfers the goods loading device from the transportation tool to the cargo vehicle and loads the goods loading device onto the cargo vehicle, and the processor controls the cargo vehicle to move on the rail beam, or the transfer apparatus unloads the goods loading device from the cargo vehicle and conveys the goods loading device onto the transportation tool; characterised in that each of the cargo vehicles comprises a cargo vehicle bogie being supported at the lower surface of the inner cavity of the rail beams, the cargo vehicle bogie comprising a bogie frame whose front and rear ends are connected with gearboxes respectively, each of the gearboxes being symmetrically provided with two output shafts on left and right sides, a travelling wheel being mounted on each of the output shafts, the cargo vehicle bogie running on the rail beams by four travelling wheels, front and rear ends of two gearboxes being connected to two frame intermediate connections respectively, front and rear ends of the two frame intermediate connections being respectively connected to two traction electric motors which control the cargo vehicle bogie to run, a lower end of the cargo vehicle bogie being connected to a goods loading device integrated spreader via a suspension device after passing through the opening, a lower end of the goods loading device integrated spreader being connected to the goods loading device; the processor is connected to the traction electric motor, wherein the rail system is bilaterally symmetrically mounted with two rail beams, the two rail beams being respectively provided with a plurality of cargo vehicles which are movable thereon, the goods loading device being suspended on a lower end of the plurality of cargo vehicles below the rail beam at each side, wherein the rail beams are of a box-type structure, a lower surface of the rail beams being provided with an opening which extends through from a front end to a rear end thereof, the cargo vehicle being supported at a lower surface of an inner cavity of the rail beams.