A rotation mechanism is provided. The rotation mechanism includes a rotation assembly, a base assembly, and a connection assembly. The rotation assembly includes a position member, a first rotation shaft rotatably coupled to the position member, a second rotation shaft rotatably coupled to the position member and separated from and parallel to the first rotation shaft, and a sliding member slidably disposed between the first rotation shaft and the second rotation shaft. The base assembly includes a base body coupled to the rotation assembly, a first slide base slidably coupled to the base body, and a second slide base slidably coupled to the base body. The second slide base and the first slide base are located at two opposite sides of the base body. The connection assembly is coupled to the base body.