The Hanbit is a complex mirror device that has a slot and a double half-turn antennas in the central cell to launch high power ion cyclotron resonance frequency range waves for plasma production, heating, and stabilization. However, there is no other device, such as a neutral beam injector, to heat the plasma ions. Hanbit also has three low-power supplies to launch electron cyclotron resonance frequency range waves for heating electrons. Under these circumstances, the main physics study in the Hanbit device has been devoted to RF-wave and plasma interaction studies, including MHD stabilization by using only the RF waves. In this paper, we briefly report the main results of the RF-heating research, MHD stability studies and discharge analysis during the past few years, as well as the future plans.