A 3D play system is provided. The system includes a head-mounted/headset device. The head-mounted device includes a supporting structure; a first lens; and a second lens. The supporting structure is configured to support two display devices. The first lens is configured to zoom an image displayed by a first device and project the zoomed image onto a left eye. The second lens is configured to zoom an image displayed by a second display device and project the zoomed image onto a right eye. The 3D play system imposes less limitation on watching environment and allows a user to watch 3D images conveniently.