The present invention relates to a light-based electric power transmission device. The light-based electric power transmission device comprises a light emitting factory, a light transfer station and a user terminal, an A light emitting body in the light emitting factory emits the strong light, the strong light reaches an a light transfer station via a strong light optical cable, is divided into the light paths of a1, a2, a3 and the like and is transmitted to the user terminal via a secondary strong light optical cable, and the light is converted into the daily household electricity to use via a photoelectric converter; the light emitting factory, the light transfer station, the user terminal and the light user terminal are a 1*1*2 mode and are similarly suitable for an n*n*n mode, at the same time, the light transfer station can be expanded into an N*N light transfer station according to the actual situation, and the user terminal can be a cell, a family or even can be expanded into an electric appliance. The light-based electric power transmission device of the present invention is simple in structure and reasonable in design, transmits the electricity in a light form, not only can get rid of an electric shock death phenomenon, but also enables the light pass through an appointed optical cable, thereby being safe, not increasing harm to the natural world, and being able to construct an electricity-free safe urban public illumination system.