In recent years, all-inorganic cesium-lead halogenated perovskite CsPbX₃ (X=Cl, Br, I) nanocrystalline (NCs) materials have become the focus of scientific research due to their unique properties such as long carrier life, strong light absorption, low-cost manufacturing, and band gap adjustability. However, the transient photoconductivity of CsPbBr₃ nanocrystals have been hardly researched. In this work, CsPbBr₃ nanocrystals were prepared by ligand-assisted re-precipitation method. Then their photoconductive sample preparation and test device of vacuum transient photoconductivity were improved. Effects of different temperatures and different excitation powers on transient photoconductivity of CsPbBr₃ nanocrystals were studied. Experiment results show that the photo-generated current decay rate is gradually reduced within the temperature range from 133 K to 273 K, and increases gradually within the temperature range from 273 K to 373 K with temperature increasing. Results of excitation power-dependent show that the photo-generated current decay rate increases when the excitation power increases from 200 to 1000 mW. The research method of this study provides a new idea for studying the dynamics related behavior of photoexcited photo-generated carriers.