An information transmission system is formed by a plurality of input devices for the transmission of an information data, wherein each input device is signally connected to an electronic device. An information transmission method includes the following steps: one of the plurality of input devices receives a connection request from another input device; the input device receiving the connection request creates a wireless communication with the input device that issues the connection request according to the connection request; the input device receiving the connection request receives an information data transmitted by the input device that issues the connection request and transmits the information data to the electronic device connected to the input device that receives the connection request.