In this work, novel series of (1-x)Li2MO4-xTiO2 (M=Mo, W; x=0.3, 0.4, 0.45, 0.5, 0.6) ceramics were developed for microwave dielectric application. They were prepared via the mixed-oxide process and the phase composition, microstructures, sintering behaviors, and microwave dielectric properties were investigated. The X-ray diffraction (XRD) pattern and scanning electron microscope analysis indicated that the Li2MO4 (M=Mo, W) did not react with rutile TiO2 and a stable two-phase composite system Li2MO4-TiO2 (M=Mo, W) was formed. The XRD pattern of cofired ceramics revealed that some parts of Li2MoO4 phase and very small part of Li2WO4 phase react with Ag to form Ag2MoO4 phase and Ag2WO4 phase, respectively. At x=0.45-0.5, temperature stable microwave dielectric materials with low sintering temperature (700 degrees C-730 degrees C) were obtained: epsilon r=10.6-11.0, Qf=30060-32800GHz, and temperature coefficient of resonant frequency similar to 0ppm/degrees C.