The $Li_2O-MgO-MgF_2-SiO_2$glasses with addition of $B_2O_3$ were investigated in order to make glass-ceramics for low temperature firing substrate. Glasses were made by melting at $1450^{circ}C$ in the electronic furnace and crystallized at $750^{circ}C$. The crystal phases were polycrystalline of lithium boron fluorphlogopite and lithium fluorhectorite. The crystal shape was chanced to granule type from needle type with increasing $B_2O_3$ content. Average particle size of the glass-ceramics after water swelling was 3.77$mu extrm{m}$. The optimum sintering temperature and sintering shrinkage of the substrate were $900^{circ}C$ and 13.4%, respectively.