Considering the present problem in the eld of robo-animals that the motor behavioral control mech- anisms in existing cases are all based on the inherent physiological features of animals, the authors present a common brain mechanism of motor behaviors control and control method accordingly. Three aspects are in- volved: (1) Presenting a key research idea based on the common mechanism not its inherent features like rat vibrissae and insect wings, exploring those brain mechanism, brain representations and its functional neural sites related to aim behavior; and ensuring aim behavior to occur and process controllable by stimulating those sites with appropriate encoding signals. (2) Proposing a de nite research procedure that focuses on the brain mech- anism about the relation among the nervous system of sensory, motivation, emotion and controls of the motor behavior, and discussing its scienti c evidence. (3) Giving the principle and method for universally applicable design to control motor behavior of robo-animal, and nally, using "robo-pigeon" to validate the study system in the experiment.