A bench platform that enables evaluation of information technology for future comprehensive healthcare systems has been developed integrating wearable physiological sensors, signal processing, short-range wireless transmission, systems networking, databases and a data processing framework. First, selection and evaluation process of communication technology and sensor devices measuring vital signs of the entire body, that have been used to design the generic software architecture of the bench platform are discussed. Then, to estimate practical problems related to real use environment, results of experiments carried out in collaboration with welfare partners are presented. Finally, the implementation of an upper framework for analysis functionalities, to which applications supporting medical doctors diagnosis process have been successfully integrated, is described.