The $Mg_{1-x}Sr_xTiO_3;(x=0.02{sim}0.08)$ ceramics were fabricated by the conventional mixed oxide method. The sintering temperature and time were $1250^{circ}C{sim}1350^{circ}C$, 2hr., respectively. From the X-ray diffraction patterns, it was found that the perovskite $SrTiO_3$ and ilmenite $MgTiO_3$ structures were coexisted in the $Mg_{1-x}Sr_xTiO_3;(x=0.02{sim}0.08)$ ceramics. The dielectric constant( ${epsilon}_r$) was increased with addition of $SrTiO_3$. The temperature coefficient of resonant frequency( ${ au}_f$) was gradually varied from negative value to the positive value with increasing the $SrTiO_3$. The temperature coefficient of resonant frequency of the $Mg_{1-x}Sr_xTiO_3(x=0.036)$ ceramics was near zero, where the dielectric constant, quality factor, and ${ au}_f$ were 20.65, 95120 and +1.3ppm/$^{circ}C$, respectively.