A robot and its component control module are disclosed. The robot includes a CPU and at least two component modules. Each component control module includes at least one actuator, at least one sensor, and a controller. The sensor is used for detecting outside information and correspondingly generating a sensing signal. The controller receives the sensing signal, controls the actuator to perform an action according to the sensing signal and sends the sensing signal to the CPU. The CPU receives the sensing signal, gets the outside information associated with the sensing signal, generates action instruction according to the outside information, and sends out the action instruction to the corresponding component control module. The controller of the corresponding component control module controls the actuator of the component control module to perform an action according to the action instruction. The robot responds quickly to outside information.