Wireless Sensor Networks WSN's has vast variety of applications, and that diversity of application become reason for its popularity. Researchers are trying to get maximum benefit of its applications by means of utilizing its maximum energy efficiency. Routing or path findings is the main operation which requires more share of energy, when nodes become ready to transfer the data to the sink, an abundant amount of research has been conducted to overcome routing energy issues. However QoS of sensor application has very important role specially in critical applications, where the accuracy and guaranteed data transfer timely is an important issue such as defense, chemical and healthcare. Hence besides energy efficiency, QoS based routing is also required to ensure best use of sensor nodes. We try to focus on operational and architectural challenges of handling QoS routing traffic in sensor networks and propose a new mechanism for QoS based routing protocol, by applying different approaches simultaneously. Simulation results shows a significant improvement towards sensor network efficiency and QoS. © 2011 International Information Institute.