The invention discloses a method for determining the gas consumption volume of a brake chamber. The method comprises: receiving a gas consumption volume obtaining request; obtaining a target input gaspressure value carried by the gas consumption volume obtaining request and an identifier of a brake chamber; obtaining a pre-constructed calculation model between the gas consumption volume of the brake chamber corresponding to the identifier and the input gas pressure; and obtaining the gas consumption volume value of the brake chamber under the target input gas pressure value based on the obtained calculation model. Based on the method for determining the gas consumption volume of the brake chamber, the gas consumption volumes of the brake chambers of different specifications under different input gas pressures can be simply and quickly obtained. The invention further discloses a device for determining the gas consumption volume of the brake chamber.