PURPOSE:To reproduce a plant information by providing display control means outputting with display the plant data at the time before/after the specified time requesting the reproduction to an interactive display inputting device in accordance with plant history data and a plant reproduction base. CONSTITUTION:An initial information and renewed contents on a plant control table 4 are taken out by preservation means 10 for plant control table to produce them in the history data base 8 for plant reproduction and an index file 9. When the request for plant reproduction is inputted by the interactive process with the display inputting device 11 in reproduction request accepting means 12, a plant reproducing menu data base 13 is formed and also that information is outputted to plant reproduction environment producing means 14. Next, when the reproducing condition is changed-over to an analysis mode, that information is forward to analysis mode changing-over means 16 by the means 14. By displaying picture changing-over means 18, a displaying picture of the device 11 is changed-over to the displaying condition specified from the device 11 to output the picture changing-over information to plant information display means 19. Then, the displaying picture for plant information is displayed on the displaying picture of the device 11 by the means 19.
