Sensor networks are formed from a collection of sensing nodes which communicate with one another, typically through wireless channels, in order to collect spatially distributed data about their environment. Sensor nodes are operating on battery power with a limited energy resources. The energy consumption is one of the most important issues and the designing of the energy consumption protocol is very critical for prolonging the lifetime. This paper introduces the LEACH routing protocol in Homogenous & Heterogeneous system supported by simulation and analysis of the results. From the brief analysis of the simulation we have come to the conclusion that LEACH Heterogeneous System provides a good performance in energy consumption and increasing the level in lifetime of the wireless sensor networks than LEACH Homogeneous System.