The microstructures and the microwave dielectric properties of the (1-x)(Mg0.95Zn0.05)TiO3-xSrTiO(3) ceramic system were investigated. (Mg0.95Zn0.05)TiO3 possesses high dielectric constant (epsilon(r)similar to 17.05), high quality factor (Q x f value similar to 264 000 at 9 GHz), and negative tau(f) value (-40.31 ppm/degrees C). In order to achieve a temperature-stable material, SrTiO3, having a large positive tau(f) value of 1700 ppm/degrees C, was added to (Mg0.95Zn0.05)TiO3. Two-phase system was confirmed by the X-ray diffraction patterns and the measured lattice parameters. Evaporation of Zn occurred at temperatures higher than 1300 degrees C and caused an increase in the dielectric loss of the system. As the x value varies from 0 to 0.1, (1-x)(Mg0.95Zn0.05)TiO3-xSrTiO(3) ceramic system has the dielectric properties as follows: 17.05