We present a method for all-optical control of silica whispering-gallery-mode microspheres with laser-induced graphene (LIG). Polyimide (PI) films are carbonized to LIG under CO₂ laser irradiation. A 980 nm laser is used as a pump light to irradiate the LIG surface, and the transmission and reflection spectra of microcavities are studied. Experimental results show that the tuning scheme maintains a Q factor of approximately ${\mathrm{10}}^{\mathrm{8}}$ throughout the tuning process, with a tuning range and sensitivity of approximately 1.09 nm and approximately 8.8 pm/mW, respectively. This scheme has the advantages of having no mechanical interference, an ultrahigh-Q factor, and a wide tuning range, thus extending all-optical tuning to applications in cavity quantum dynamics, nonlinear optics, and low-threshold lasers.