According to The Ministry of the Interior year 2012 first season National survey, there are 36,204 dementia patients in Taiwan. However, base on dementia community prevalence survey, there are approximate 120 thousands patients in Taiwan. Dementia family caregivers issues become important issue. Purpose: This study will focus on the relationship between sleeping quality and the experience of positive aspects of caregiving by the stress process model which Hilgeman and other researchers purpose in 2009. Methods: A questionnaire composed of the Revised Ways of Coping Checklist(RWCC), Chinese Pittsburgh Sleep Quality Index(CPSQI), Positive Aspects of Caregiveing(PAC), demographic information and Sleep Log was used to investigate 84 caregivers. In addition, caregivers have to wear the actiwatch for three days and two nightsfor collecting objective sleep informaiton. Results: The results revealed that 92.4% female caregivers report have poor sleep quality and 75.6% caregivers’ objective sleep efficiency are lower than 85% cut off point. The interaction between positive aspects of caregiving and coping style predicted both subjective and objective sleeping quality in female dementia family caregivers. Conclusions: One the intervention in the future, focusing on enhancing the caregiver’s positive aspects of caregiving and coping appropriately will buffer poor sleeping quality.