Today's world is marching towards computerization and globalization. Computer makes things better than people. Computer plays an important role in day-to-day life. It is very essential in the modernized world, as more and more people are working with computer. So this thesis deals with computer in an easy way. The thesis entitled as "Wireless Sensor Networks with Minimum Utilization and Maximum Lifetime under joint Routing" is developed using C#.net. This is mainly used to minimizing energy dissipation and maximizing network lifetime. These are important issues in the design of applications and protocols for sensor networks. Energy-efficient sensor state planning consists in finding an optimal assignment of states to sensors in order to maximize network lifetime. It is based on Joint Routing & Coverage constraints, the wireless sensor networks consists of large numbers of MEMS (Micro Electro Mechanical Systems). It capable of measuring & reporting physical variables. The MEMS are combined and form Joint Routing. Coverage of the sensors should be constraint such that the range of access is limited. It reduces the usage of energy which is used by WSN.