The restoration front and back change information compilation department which draws up the information of the restoration front and back change which relates to the system change of restoration job front and back in every restoration job object the restoration methodological information compilation department which draws up restoration methodological information in every restoration job object which resembles (33) with, on the basis of the information of the job front and back change which is in the midst of remembering in every job object usual, job methodological information and the job information management memory section which remembers the information of job front and back change (41) with, on the basis of the job methodological information which is in the midst of remembering, among the job objects, (34) with, information of restoration methodological information and restoration front and back change in every restoration job object memoryThe restoration methodological management memory section which it manages (42) with it possesses, it becomes possible to select the restoration methodological information for unknown obstacle on the basis of the information of the restoration job object and the restoration front and back change which correspond to obstacle.
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