A hopper case comprises the bottom plate and the side wall connected to the bottom plate, the two of which form the reversed conical case with opening at the top. The hopper weight and forklift device are integrated, simplified in structure, being able to be loaded at one time for the whole journey, and the cases being able to inter inserted in air transportation and storage, with the weight and the forklift to work together for loading. For weight transportation and storage, it can use weight and forklift to stack weight and save storage and transportation cost.