User interface of a mineral processing equipment governs a mineral processing line having several units (crushers, screens) connected in series. The user interface comprises a display screen (14) and control buttons or keys and is connected through a data transmission link to sensors and actuators of the mineral processing equipment for receiving measurement data and sending control commands. The user interface is arranged to show within the display screen (14), by choice of the user status of the mineral processing equipment in diagrammatic representation, or a live camera view (21) of at least one point of the equipment. The diagrammatic representations can be in form of a traffic lights (20) indicating the feeding speeds of the units.