Every year many earthquakes of varying intensity takes place in the world. The severe ones of these lead to the destruction of property and loss of many lives. In such natural disasters, quick location of the trapped victim under the earthquake rubbles becomes very difficult as it takes several Hours to several days. Post Earthquake Rescue system (PEQRS) can be used to identify any living being buried under the earthquake rubble or hidden behind various barriers. It uses transmission of microwave frequency (L band) which can penetrate any debris also including the walls. These transmitted waves reflects back to the system through the stationary background and gives the presence of living being by illuminating the modulated wave by the subject's breathing body movements. Software based real time data acquisition system has also been developed and included to make available a compact arrangement for the Post Earthquake Rescue system, which was otherwise a Digital CRO, required carrying additional equipment. This system can be carried to any inconvenient location because of its compact and mobile nature and digital detection technique which are very less prone to errors.