This paper is related to the development of Cooperative Power and Energy-efficient RoutingProtocol named as COPER for the Wireless Sensor Networks and its performance is compared with the Low Energy Adaptive Cluster (LEACH) and Power Efficient Gathering in Sensor Information Systems (PEGASIS) routing the rejuvenated & improvised routing protocol schemes. NS2 is used as the simulation tool. The comparison of the work done isbased on the performance metrics of the WSNs such as the packet delivery ratio energy efficiency and thethroughputs and the effectivity of the protocols proposed is seen here. From the results, it can be inferred that after each round, the number of dead nodes is relatively very less, but the number of alive nodes increases after every round because of energyefficiency, thus providing a better throughput. The entire WSN will be able to transmit more number of data packets from the nodes to the destination, henceincreasing the throughput of the proposed system. The simulation results shows the effectivity of the methodology that is being proposed by us.