With the increasing in wireless communication applications, the Cognitive Radio (CR) ability enhances the efficiency of WSN for wireless transmission. In this paper, the purpose is an energy-efficient routing protocol for Cognitive Radio Wireless Sensor Network (CRWSN). It is based on the Threshold sensitive Energy Efficient sensor Network (TEEN) routing protocol. This paper also aims at the Grid Clusteringbased TEEN protocol (GCTEEN) to enhancement the network energy consumption and the network lifetime. MATLAB will be beneficial for appreciating the output of the proposed method. The Simulation findings offered and discussed that GCTEEN has a longer network lifetime, high energy-efficient, increases in throughput, and reduces the delay compared to the TEEN protocol.