The invention discloses a plant building for configuring a crane. In the plant building, the installation height of an overhead crane girder is lowered and a portal crane is installed on the overhead crane girder, so that the action point of horizontal force of the crane is lowered and the structure of the plant building and the infrastructural investment are reduced; a crane girder braking platform can be used for placing equipment and the part below the braking platform can serve as walkways, so that the utilization rate of the plant building is improved; and a middle pillar can be arranged under the crane girder, so that the span of the crane girder is reduced and the investment is further decreased.