To provide a robot system, and a control method thereof.

In the control method for the robot system, expression and voice information are received by an input unit to be transferred to a processor. The processor converts the expression and sound information into a corresponding expression signal and a voice signal. The expression signal and the voice signal are received by an expression and voice synchronous output unit to be synchronously transferred. An expression generating control unit receives the expression signal, and generates a corresponding expression output signal. A plurality of actuators generate an expression on a pseudo-face in accordance with the expression output signal. A voice generating control unit receives the voice signal, and generates a corresponding voice output signal. A speaker transfers voice in accordance with the voice output signal. Output of the voice from the speaker and generation of the expression on the pseudo-face by means of the actuators are synchronously carried out.