Inclusion Criteria:  Dementia Case Managers:  Be at least 20 years old and could communicate in Chinese or Taiwanese. Currently work for dementia center, dementia care center, or Community-Based Dementia Care Center in northern Taiwan (including Taipei, New Taipei, Taoyuan, and Hsinchu).  Dementia family caregivers:  Be at least 20 years old and could communicate in Chinese or Taiwanese. Primary caregivers The people with dementia under care are diagnosed with dementia Clinical Dementia Rating Scale(CDR) 0.5 or higher. Live in northern Taiwan(including Taipei, New Taipei, Taoyuan, and Hsinchu).  Exclusion Criteria:  Dementia Case Managers:  No longer working for dementia center, dementia care center, or Community-Based Dementia Care Center in northern Taiwan (including Taipei, New Taipei, Taoyuan, and Hsinchu).  Dementia family caregivers:  The people with dementia under care live in a long-term care facility or nursing home.