An optical base station including a base, a light source, a rotation plate and an optical fiber is provided. The light source is disposed on the base for providing a light beam. The rotation plate is disposed on the base. The optical fiber is disposed on the base and has an input end and a first output end. The rotation plate drives the optical fiber to rotate around a rotation axis. The rotation axis passes through the input end. The light beam enters the optical fiber from the input end and is output from the first output end after being transmitted in the optical fiber.