SUSY search at ATLAS

This talk focus on the early SUSY search at ATLAS. ATLAS has the potential for the discovery of 1TeV SUSY at early data (1fb-1). The key point of the discovery is the understanding of the Standard Model Backgrounds. This is the reason why the resent studies concentrate on the development on the data-driven techniques of the background estimation. Many methods have been proposed and redundantly cover all the backgrounds. Some of them are found to be promising, although the studies of the systematic uncertainties are ongoing.