The embodiment of the invention provides a freight ordering method and system, and the method comprises the steps: carrying out the marking of the ordering priority of working platforms in advance; recognizing the working platform which carries out the ordering preferentially if the plurality of working platforms send ordering instructions in the same period; judging whether the carrying feature information of the working platform which carries out the ordering preferentially meets a preset condition of the preferential ordering or not: carrying out the preferential ordering of the working platform which carries out the ordering preferentially if the carrying feature information of the working platform meets the preset condition of the preferential ordering. The method achieves the markingof the ordering priority of the working platforms in advance, achieves the recognition of the working platform which carries out the ordering preferentially when the plurality of working platforms send ordering instructions in the same period, and judges whether the carrying feature information of the working platform which carries out the ordering preferentially meets the preset condition of thepreferential ordering or not, so as to determine whether to carry out the preferential ordering of the working platform which carries out the ordering preferentially. Therefore, the method can guarantee that the important working platform is always in a working state, prevents the important working platform from being in an idle state, avoids the capacity loss caused by an ordering platform, andimproves the production efficiency.