Truss robot is a kind of full-automatic industrial equipment based on right angle X, Y and Z coordinate system to adjust the working position of the workpiece or realize the trajectory movement of the workpiece. Its control core is realized by industrial controllers (such as PLC, motion control, single chip microcomputer, etc.). Through the analysis and processing of various input (various sensors, buttons, etc.) signals by the controller, after making certain logical judgment, the controller issues execution commands to each output element (relay, motor driver, indicator light, etc.) to complete the joint movement between the X, Y and Z axes, so as to realize a complete set of fully automatic operation process.