PURPOSE: To generate and correct easily a program, and also to execute a high speed processing or a high speed control by providing a processing table for prescribing processing contents and the flow of a processing in the form of a constant, and a processing control means for making a processing executing means for executing a processing execute the processing.

CONSTITUTION: A processing control means 3 fetches a processing instruction on an instruction table 1, gives a necessary processing parameter to a processing executing means 2 through lines 100, 102, if the contents are, for instance, a sub-processing number 2, and shifts to an execution of the sub-processing 2. Subsequently, when the execution of the sub-processing 2 is ended, the processing executing means 2 sends status information related to the sub-processing through necessary lines 103, 101, and returns a control to the processing control means 3. The processing control means 3 decides an error, etc. which have been generated in the course of executing the sub-processing 2, based on the status information, takes a necessary step, and thereafter fetches, for instance, a processing instruction of an instruction table 2, in accordance with a flow of the processing which has been prescribed in the instruction table 1.