PURPOSE: To facilitate input of a large amount of scene data and their modification in control actuators for driving stage mechanisms based on the scene data by inputting the scene data in the form of expression using variables and then values of the variables.

CONSTITUTION: A setting position and a driving speed of each stage mechanism A1 to An driven by its corresponding actuator B1 to Bn are controlled by a control part 1 in response to output signals from a scene data processor 2. In this instance, an operation storage 5 in the scene data processor 2 is constituted of a memory 5A which stores scene data regarding setting positions and motion speeds of each of the stage mechanisms A1 to An in the form of values or expressions, and another memory 5B which stores a correspondence table for substituting real values for the variables in the expressions. In order to respond to a case that any modification is needed in the scene data after rehearsals and so on, a value among the variables on the correspondence table is selectively inputted through an input part 3.