The invention discloses a luminous element with a changeable light emission direction. The luminous element with the changeable light emission direction comprises a luminous body, a switch liquid crystal and optical fiber. Due to the fact that a control device controls the corresponding switch liquid crystal to open or close, the control device controls whether light emits in the corresponding direction or not, namely, the control device controls the light emission direction of the luminous element with the changeable light emission direction. In some cases, light emitted by any one of light-emitting diodes (LEDs) is visible at one angle, and the light emitted by any one of the LEDs is invisible at the other angle. For example, when a three-dimensional image is formed by a rotational screen introduced in , some body pixel points can be sheltered by other body pixel points at some angles according to requirements of the formed three-dimensional image, namely, light emitted by the body pixel points can not be received at the angles. The body pixel points are not sheltered at some angles, namely, the light emitted by the body pixel points are required to be received at the angles. The luminous element with the changeable light emission direction is capable of solving the problems of two-dimensional imaging and three-dimensional imaging of the LEDs.