An optical transmission system includes an optical emitting source, a plurality of optical fiber connectors, a first optical fiber, a plurality of second optical fibers, a plurality of third optical fibers, and a plurality of optical receiving terminals. The optical emitting source is configured for emitting optical signals. The first optical fiber connects the optical emitting source to one of the optical fiber connectors. Each of the second optical fibers is connected between two adjacent of the optical fiber connectors. Each of the third optical fibers is connected between a respective one of the optical fiber connectors and a respective one of the optical receiving terminals.