We investigated the effects of calcination temperatures on the sintering behaviors and microwave dielectric Properties of (Z $n_{0.8}$M $g_{0.2}$)Ti $O_3$ system. Highly densified samples were obtained at the sintering temperatures below 100$0^{circ}C$ with additions of 0.45 wt.%B $i_2$ $O_3$ and 0.55 wt.% $V_2$ $O_{5}$. From the examination of the existing phases and microstructures before and after sintering of (Z $n_{0.8}$M $g_{0.2}$)Ti $O_3$ system which is calcined at the various temperatures ranging from 80$0^{circ}C$ to 100$0^{circ}C$, it was found that higher Q${ imes}$ $f_{o}$ values were obtained when unreacted phases in calcined body were reduced. When calcined at 100$0^{circ}C$ and sintered at 90$0^{circ}C$, it consists of hexagonal as. a main phase with uniform microstructure and exhibits Q${ imes}$ $f_{o}$ value of 42,000 GHz and dielectric constant of 22. 22. 22.