A robotic device in accordance with a plurality of embodiments is provided. The robotic device generally includes a plurality of groups of sensing devices for sensing environmental events; a plurality of controllers for recognizing the environmental events and generating corresponding commands; a plurality of driving devices for driving the robotic device to respond to the environmental events under control of the commands; at least one communication line for communication between the controllers; at least one power line for transmitting power to the sensing devices, the controllers and the driving devices; a plurality of ground lines; a plurality of branches extending out from the communication line, the power line and the ground lines; and a plurality of connectors for connecting the controllers to the branches.