Since the discovery of magnetism in two dimensions,effective manipulation of magnetism in van der Waals magnets has always been a crucial goal.Ionic gating is a promising method for such manipulation,yet devices gated with conven-tional ionic liquid may have some restrictions in applications due to the liquid nature of the gate dielectric.Lithium-ion conducting glass-ceramics (LICGC),a solid Li+ electrolyte,could be used as a substrate while simultaneously acts as a promising substitute for ionic liquid.Here we demonstrate that the ferromagnetism of Fe3GeTe2 (FGT) could be modulated via LICGC.By applying a voltage between FGT and the back side of LICGC substrate,Li+ doping occurs and causes the decrease of the coercive field (Hc) and ferromagnetic transition temperature (Tc) in FGT nanoflakes.A modulation effi-ciency for He of up to ～ 24.6％ under Vg =3.5 V at T =100 K is achieved.Our results provide another method to construct electrically-controlled magnetoelectronics,with potential applications in future information technology.