In this work, two types of metamaterial based on four symmetrical arc-shaped and line-shaped “T” cantilevers are investigated as resonator arrays, which can be structurally reconfigured by a thermal actuation mechanism. The simulation results show that both of the proposed metamaterial structures provide not only a resonant multiband-frequency operation but also polarization-independent tunability. The three resonance frequencies can be continuously adjusted in the range from 0.5000 to 2.5000 THz when the angles between the released cantilevers and the silicon substrate are changed at different temperatures. By investigating the electric and magnetic field strength distributions at the resonant frequencies, we have concluded that the multiband absorptions are caused by dipole-type resonance mechanisms. Our proposed tunable metamaterials have some advantages, namely, simple resonant structure, mechanism, and multiband operation frequencies in a narrow frequency range; these are highly desirable for THz applications in high-sensitivity sensing, tunable filtering, switching, frequency-selective detection, and multispectral imaging.