It is difficult to discover Walkable Path for a doctor going to the targeted patient basis in the confused calamity spot. Applying a sensor network to an emergency lifesaving system called triage which makes a lifesaving order decision is an active area of research. Although research which saves the energy and the traffic in the case of the information gathering to a sink node is done, they do not inquire about offer of Walkable Path to the patient for a doctor treating. It is indispensable to support discovery and its navigation of Walkable Path in the calamity spot. In this paper, we propose the Walkable Path Discovery technique of using bandwidth efficiently at the same time it supports navigation of Walkable Path. Walkable Path and a Network Route are held simultaneously and sudden change message transfer is performed using the Network Route. Simulation evaluation is performed and we show effectiveness of our proposal.