Abstract: An embedded remote health care system based on wireless sensor network technology is established.Firstly,a new system architecture is proposed which introduces a scalable wireless sensor network with a variety of wireless physiological sensor nodes.Then the designs of several wireless physiological sensor nodes and the care base-station are presented.Wireless communication between the sensor nodes and the care base-station is realized with IEEE 802.15.4 /Zigbee standard,and the care base-station and the remote central server are connected in one of the following ways,including computing network,GSM short messages and telephone modem.The system can be used at home or in hospitals to form a remote health care system among home,community and hospital.