3. The robot system according to claim 2 , characterized in that: the operation execution module includes an audio operation execution unit and a motor operation execution unit, and further includes an indicator light unit, wherein the indicator light unit comprises an eye indicator light and a mouth indicator light which are respectively connected with the control module; wherein the eye indicator light blinks under the control of the control module during the operating of the audio operation execution unit or the motor operation execution unit; and wherein the mouth indicator light blinks under the control of the control module during the operating of the audio operation execution unit.
3. The robot system according to claim 2 , characterized in that: the operation execution module includes an audio operation execution unit and a motor operation execution unit, and further includes an indicator light unit, wherein the indicator light unit comprises an eye indicator light and a mouth indicator light which are respectively connected with the control module; wherein the eye indicator light blinks under the control of the control module during the operating of the audio operation execution unit or the motor operation execution unit; and wherein the mouth indicator light blinks under the control of the control module during the operating of the audio operation execution unit. 4. The robot system according to claim 3 , characterized in that: the primary robot and the secondary robot further comprise an obstacle detecting module, and the obstacle detecting module comprises at least one of an infrared sensor and an ultrasonic sensor, wherein the infrared sensor and/or the ultrasonic sensor are/is connected with the control module, for detecting obstacle and junction of higher and lower surface during the operations of the motor operation execution unit, and for sending the detection signal to the control module; wherein the control module is also used for sending turning round or back-off command to the motor driving device after receiving the detection signal, the motor driving device is used for driving the motor, and the mechanical moving device is used for achieving turning round or back-off of the primary robot or secondary robot.