Graphical user interface device

A graphical user interface device for use in a monitor control system for a monitor control of a plant, said graphical user interface device comprising:

• an operation procedure information database in which text information forming an operation manual and a display item to be operated by an operator are registered for each of operation steps;
• a display element information database in which display element information about a display element included in said display item is registered;
• an operation determination section that determines a current operation step from said operation steps based on information given from said plant;
• a display element selection section that selects, from said display element information database, said display element information corresponding to said display item of said current operation step determined by said operation determination section;
• and
• an integrated procedure and display-element screen preparation section that, based on said display element information selected by said display element selection section, prepares a layout of an operation screen allowing said text information and said display item corresponding to said current operation step to be simultaneously displayed on a single screen of an interface device.