Basic component is represented by the nodes in wireless sensor network. The sensor nodes consumes energy during sensing, constrained sensor networks. Averaging is method for aggregation data from multiple nodes. In wireless sensor network resources like energy, powers etc. are limited. In this paper, the monitoring system and READA technique will be used for the grouping and compression mechanism. In single target of interest the number of sensor nodes can detect simultaneously. Redundant and correlated data are collected and also data aggregation the authors reduce the energy consumption by eliminating redundancy.