Health Maintenance systems are a special monitoring systems of the basic life functions. The goal of the work was to design and realize the wireless body sensor networks for on line vital function monitoring. The system is based on wireless sensors, information technologies and embedded computer systems. The man uses modified places where the monitoring systems that watch movement, position and chosen life functions are installed. In this case all the information about person's basic life functions and geographical location transmitted by wireless technology. All the measuring devices communicate with embedded microprocessor system wireless by Bluetooth or ZigBee technology. Ill. 3, bibl. 9 (in English; abstracts in English and Lithuanian). http://dx.doi.org/10.5755/j01.eee.115.9.762