Due to the social development, people become busy.The Home-care service is getting important day by day. Tele medicine is going to be popular in stead of classical hospital medical way. Location system is the basic element of Home-care. It brings fast about resolving accidents. When something happens, it locates where are you and provides this information to nurse department. This study tries to design a reliable and steady ZigBee location system for Home-care service. It can resolve accidents fast, and analyze location information to rescue in advance. We also design several experiments to get and analyze data to explain how to get a reliable and safe ZigBee location system.