Abstract: A racket-free tennis training device includes a maneuverable platform on which an elevation mechanism is mounted. A ball receiving and shooting mechanism is mounted on the elevation mechanism. The ball receiving and shooting mechanism includes a ball receiving mechanism, a ball management mechanism, and a ball shooting mechanism. The ball receiving mechanism includes a ball receptacle. The ball management mechanism includes a ball collection barrel and an advancing mechanism. The above arrangement allows for correctly receiving a tennis ball from an opponent site and then serving a ball to the opponent site to simulate an actual tennis game.