The utility model discloses a two car communications of intelligence and follow teaching experiment device and method for, this device including install the front truck system of front truck with install the back car system at the back car, front truck system and back car system all include master control equipment, power confession pressure equipment is put, direct current motor drive arrangement, the steering control device, and a wireless communication device, the LCD screen, the speed sensor, range unit, dial switch and button device, front and back car system passes through range unit and measures the initial car distance of front and back car, the angle is beaten through the target speed and the target of the front truck that the settlement is good that wireless communication device receipt PC was sent by front and back car system, beat the angle in order to be close the setting value through increment formula PID control adjustment actual speed and through the adjustment of steering control device is actual, the communication of car and the teaching process of following around realizing, this apparatus and method for makes colleges and universities' control class, communication engineering class specialty experiment teaching obtain good teaching effects, makes the student can master the expert knowledge livelyly directly perceived.