The invention discloses a smart voice wake-up control method and a control device thereof. The smart voice wake-up control device includes a casing, a main control board, a control switch, a voice pickup, a relay, an output terminal, an input terminal and a work indicator capable of emitting multiple colors of light, the main control board is respectively connected with the control switch, the voice pickup, the relay and the work indicator, and the relay is respectively connected with the output terminal and the input terminal. When multiple smart voice wake-up control devices are used simultaneously, the user can change the light color of the work indicator by controlling the control switch to distinguish different colors of voice wake-up commands, i.e., use the light color of the work indicator to show the color wake-up voice, so that the user can get the wake-up commands intuitively and quickly for controlling.