Space selective gold nanoparticles were precipitated in silicate glasses containing gold ions by irradiation with Ti∶sapphire femtosecond pulsed laser and heat treatment. Absorption spectra measurements show that the plasmon absorption peak of the precipitated gold nanoparticles shift red slightly and their intensities increase with the increasing of treatment temperatures; Also, average size of nanoparticles increases along with increase in laser power density. This means that under the given laser irradiation and heat treatment conditions, gold ions inside the glass can be reduced to Au atoms and then accumulate to form gold nanoparticles with quantum size effect. According to the laser irradiation profiles, the sizes and multicolor display of gold nanoparticles can be controlled by changing the power density of irradiation. Au nanoparticles are stable, and their color is fadeless at room temperature.