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Based on large-scale integrated circuits, taking computer and communication technology as a means, a majority of modern electronic equipments are intelligent embedded devices. embedded systems resources, especially critical resources, should be managed, because the over-degradation of them could rise to performance deterioration and even collapse for the whole system. To users, they need a good interface for proper interaction. If there are any functional demotion caused by the degradation of system resources, interface elements need to be adapted suitably and be harmonious with current status of system performance. This study focused on how embedded device HCI self-adapts while system resources degenerate to make related functions degrading. Researching the problem is one aspect of research of prognostics and health management(PHM) and will promote it.