The invention provides a placement device comprising a servo motor, a placement main shaft, a placement sucker and a sensing device. The servo motor is connected with the placement main shaft and is used for driving the placement main shaft to rotate; the placement main shaft is connected with the placement sucker and is used for driving the placement sucker to rotate; the placement sucker is used for sucking an electronic element for placement; and the sensing device is connected with the servo motor and is used for sensing a rotating angle of the placement main shaft and generating a sensing signal when the placement main shaft rotates to a preset angle so that the servo motor drives the placement main shaft to stop rotating according to the sensing signal. The placement device has lower cost, reasonable structure, good exchangeability, and the placement precision and the efficiency satisfy the production requirements. The invention also provides a method for placing electronic elements by utilizing the placement device.