The purpose of this paper is to study the relation between working efficiency and the space of the stage during the preparation of the stage by investigation of using stage. We investigeted the working process from setup period to the stage by 8 different performances at three theaters. The conclusion shows : (1) In order to increse the working efficiency, it is not enough only have main stage but also should have assembly space and side stage. (2) Because the regulation of the lighting fixtures is very often, so as to make it simply it is necessary to set up the light bridge.