To provide a GUI driven type network control system by which an operation environment suitable for each function and each device can be built up with a simple configuration and an operation environment operating integrally each device can easily be configured and to provide devices and controllers used for the GUI driven type network control system.

The GUI driven type network control system is configured to utilize function information with a panel 51 and a display component 52 consisting of a data object and a list form object that have an identifier(ID) identifying each object, type information denoting a type of an object, attribute information denoting the configuration as to whether or not a slave object or the like is provided, and size information denoting a size of each object at their header parts.