A golf putting teaching device includes a path with two side walls and each side walls has a plurality of first sensors on an inside thereof. An end piece has a top board and two side portions. The end piece is mounted across two sides of the path and a plurality of second sensors are located on an underside of the top board. The first sensors in the side walls are electronically connected to the second sensors of the top board. A controlling device is connected to one of the tow side portions and electronically connected to the first and the second sensors so as to process the data collected from the first and the second sensors to display the direction, speed, distance, and other necessary information for each putting.