The innovation in the preparation of catalyst and nano or nano-structured materials plays more and more important role.In this presentation, the recent progresses in the use of cold plasmas for the preparation of the catalyst and nano energy materials will be discussed.Under the influence of the cold plasmas, the nucleation and crystal growth are different from the thermal preparation.This leads to the catalysts or nano materials with unique performances.The size, shape and structure control can be achieved too.The cold plasma preparation can be operated under room temperature with highly energetic electrons.This makes it excellent for the loading of noble metal nanoparticles on the thermal sensitive substrates.