This paper proposes a full-order terminal sliding-mode based energy saving control for the grid-connected converter of induction motor systems. DC-link voltage and currents controllers of the converter are designed respectively using the full-order terminal sliding manifold and the related control strategies. The chattering in the sliding-mode control is attenuated, and continuous control signals are obtained. The energy-saving operation of the induction motor systems is achieved because the regenerative energy of the induction motor is fed back to the power grid with unity power factor. The simulation results validate the proposed method.