Aid is necessary for many elderly people with diseases, like dementia or apoplexia cerebri and this need for support is increasing rapidly in aging societies. This support is increasing rapidly with the society. On the other hand, there are many discussions about the preventive care. Preventive care of elderly people is reported to be significant in both mentally and physically supporting. In particular, those supporting is actively studying the use of games and IoT system for preventive care

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... home. Until now, those supporting tasks are put into hospitals/clinics and rehabilitation facilities have been the main places. About actual rehabilitation of elderly people, this continual rehabilitation is a kind of functional recovery and care as indispensable. However, this style of rehabilitation is very hard work every day. In this case, long time care is a significant and hard job. Also, preventive care and home system have the potential to help with rehabilitation. The feeling and motivation of patients affect this potential with rehabilitation. Therefore, we are proposing the personal system which has the multi-function for any type rehabilitation as the preventive care. A proposal system of our laboratory has a concept from a suitable size touch panel to a rehabilitation exercise. The touch panel system has an effect on haptic feedback. This feedback is able to support the preventive care. The preventive care by the proposed Cognitive Therapeutic Exercise (CTE) would be necessary for the aging society and the preventive care problem. This paper proposes an alternative measurement system on a usability scale for rehabilitation games based on CTE. This idea supports the current preventive medicine and current rehabilitation theory. For preventive medicine, those ideas are affected. A game with touch feedback is one of these ideas. For keeping the rehabilitation jobs, the game system should be fun and enjoyable. This paper discusses the new usability evaluation system as the rehabilitation interface theory. Two touch panel systems are tested using a Whac-A-Mole game. For effect of the user-friendly and enjoyable games, play continuously without getting bored, it is necessary to evaluate according to usability. About setting the difficulty level, it was confirmed of a new system evaluation method with defined 5-evaluation factors effects.