The invention discloses a high-efficient and environment-friendly transferring and unloading method for powder and a powder container used for the same. The method and the powder container aim to overcome the defects that in the prior art, bulk transfer of powder is high in manufacturing cost, conveying efficiency is low, energy consumption and unloading cost are high, potential safety hazards exist, an amount of dust is leaked outside, and the environment is polluted. The powder container which is flexible, waterproof and foldable is arranged on a means of transport, powder is loaded into the powder container and transported to the destination, and the powder is sucked out from the powder container under a negative pressure condition and transported to a powder field of the destination or a material warehouse of the destination. The powder container is provided with a flexible and waterproof material wall capable of being folded, and the flexible and waterproof material wall is provided with a powder channel and an exhaust mechanism. The powder container is mainly used for storing, transferring and conveying the powder such as cement and pulverized fuel ash, the powder container can be folded so that the size of the powder container can be reduced, the environment protection property and safety are good, the manufacturing cost is reduced by more than 70%, energy is saved by more than 15%, transferring cost is lowered by more than 40%, efficiency and benefits are improved by more than 20%, and floating dust is reduced by more than 10%.