For satisfying the voice-based communication requirements of intelligent robotics, based on the DM-B200 robot, the speaker identification system and command recognition system are designed. In order to improve the correct recognition rate of speaker identification, the vector quantization method is used. And the dynamic time warping algorithm is used to speed the command recognition process. The application results showed the designed systems obtained more than 96% correct recognition rate and are easy to be extended to the real production.