The invention discloses a multi-functional tool device special for a cargo containment system of a liquefied natural gas (LNG) ship. The multi-functional tool device comprises a vehicle body of which the bottom is provided with universal casters; one side of the vehicle body is provided with a movable handle; the relative second side is connected with a folding construction platform; more than half of a third side of the vehicle body is arranged in a form of stacked drawers, the upper part of the residual less than half of the third side is provided with a display screen, and a lower part area is provided with a distribution box, a cable winder and a compressed air winder; one side of the top of the vehicle body, which is near the movable handle, is provided with a remote control lifting platform, lifting power is supplied by the vehicle body, and a transmission mechanism is positioned in the vehicle body; and the remote control lifting platform is provided with a tool box and an electrical appliance unit for construction. The multi-functional tool device can be used conveniently and flexibly, and can greatly improve the construction efficiency of an operator.