The invention provides a raw material steaming method and a raw material steaming system. The method comprises the following steps of: raising the internal temperature of a raw material container with raw materials to a set temperature; continuously heating the raw material container at the set temperature and introducing saturated water vapor at the set temperature into the raw material container; and after preset time is up, stopping heating the raw material container and introducing air at the set temperature into the raw material container. The system comprises the raw material container,a heating device and a regulation device. The loss of water-soluble components from the raw materials through condensed water can be greatly reduced or even completely avoided and the effect of the raw materials is ensured.