A plant monitoring apparatus and a storage medium which allow engineering efficiency and data reliability to be improved are provided. There are disposed TAG databases 11a and 11b which store, according to an identifier, fixed parameters which are shared by a monitoring device 2 and a controlling device 3 composing the plant monitoring apparatus 1 and which are correlated with each input point. A distributing means 8 distributes fixed parameters edited by a database editing means 7 to both the monitoring device 2 and the controlling device 3 at a time.