An improved structure of a lighting display device includes a lower fixing element, an upper fixing element, a projection device, a transparent bottle, and an assembling element. The projection device is disposed inside the lower fixing element and the transparent bottle is disposed thereon and fixed by a positioning annulus on an inner surface of the lower fixing element. The assembling element has a depression surface atop to be engaged a positioning plate of the upper fixing element and an upper engaging space to mount on the transparent bottle. A spring is further disposed between the upper engaging space and the transparent bottle. Thereby the transparent bottle is able to display attractive visual effects by lighting projection and to be easily engaged and disengaged.