The invention provides an air volume scheduling method and device for a variable air volume system. The method comprises the following steps: acquiring collected data of blowing areas of the variableair volume system; determining needed air volumes of the blowing areas according to the collected data; and determining distributed air volumes of the blowing areas according to the needed air volumesof the blowing areas and the capacity of a fan of the variable air volume system. According to the technical scheme of the embodiment of the invention, the accuracy of calculating the needed air volumes can be improved, and the distributed air volumes of the blowing areas can be scheduled intelligently.