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Organic-inorganic CH3NH3PbBr3 perovskite nanoparticle have emerged as highly promising semiconductor materials for photovoltaic and optoelectronic applications such as solar cells, light emitting diodes (LEDs), and other luminescent devices because of their optical properties and electrical conductivity. The optical properties of perovskite can be manipulated when bulk structures change into lower-dimensional structures to obtain the desired optical properties. However, perovskite suffers from a stability problem that makes it degrade easily. Fumed silica (SiO2) is one of the complementary material that is expected to improve the photoluminescence stability of perovskite. In this study, we added fumed silica (SiO2) as a composite material to CH3NH3PbBr3 perovskite nanoparticle, with a varied precipitation temperature prepared by ligand-assisted reprecipitation method (LARP). A preliminary study of the SiO2 effects was conducted based on the photoluminescence (PL) characterization using a fluorescence spectrophotometer, UV-Vis spectroscopy, and transmission electron microscopy (TEM).