Abstract: How solar energetic particles impact on polar ozone content is a highlight of space science study. This article introduces the mechanism that solar energetic particle precipitations induce the depletion of ozone when these particles go into the atmosphere along the magnetic lines, the observations on typical ozone depletions caused by particle precipitations and the modeling results. We also discuss the applications of atmospheric chemistry coupling models on how ozone depletions caused by particle precipitations impact on climate change and the model simulations of extreme space weather events.