To improve the independence of people with dementia, we developed an assistive product that displays the users daily schedule. Participant observation in a group home for older people indicated the considerable factors in designing the system: (i) installation location of the system, (ii) contents of the indicator, and (iii) the methods to display the contents. We created a prototype of the system, considering characteristics and symptoms of dementia, and displayed it in a group home for senile people. The optimum design for each resident could be decided by comparing the frequency in use, which was analyzed from the image of the users, or the degree of interest and understanding, analyzed from the users speech. From the data of all the residents, we suggested toptimum design of the system to display in this group home.