Along with the emergence of real-time muhi-media, interactive service, real-time voice and other services calling for high quality of service, there should be a good network to support those services. Most present route algo-rithms with computational complexity hardly consider the restriction of node energy, so it degrades the whole capabil-ity of network. Bandwidth guarantee is one of the most crucial factors in real-time application, and this paper brings forward a distributed on-demand QoS routing protocol based on energy and bandwidth requirement. This QoS routing protocol makes use of bandwidth calculation algorithm and analyzes its route mechanism. The simulation results veri-fy its validity. The QoS routing protocol improves the packet delivery fraction and average end-to-end delay, prolongs the network lifetime, enhances the network performance and satisfies the route requirement for ad hoc networks.