For the control group, after the initial assessment, the case manager will give the dyads written information about dementia and its progress as well as home safety during the first home visit. Then case manager will make 2 phone calls in the 2nd and 3rt months for social interactions with the control group and collect the cost data. These phone calls do not involve in active education, consultation or cognitive stimulation and training. The control dyads will remain their usual care, i.e., visiting their primary care physicians or special neurologists for treatments or related consultation as well as education. The participating physicians will be unaware of the dyads allocation to either intervention or control condition. The dyads in the control group have no access to most of the structured and tailored activities. The outcome data will be collected at the 4th month (T1), 6th month (T2) and 12th month (T3)