Bicycle wireless communication method and system thereof

A wireless communication system of bicycle comprising:

• a master controller comprising a trigger device and a first communication unit, wherein the trigger device electrically connects to the first communication unit, the trigger device is configured to generate a control signal according to a trigger event, and the first communication unit is configured to send the control signal;
• a slave controller comprising a driving device and a second communication unit, wherein the driving device electrically connects to the second communication unit, the driving device is configured to drive a controlled device according to the control signal, and the second communication unit is configured to receive the control signal;
• and
• an intermediate device comprising a first communication connection with the master controller and a second communication connection with the slave controller, wherein the intermediate device is configured to send a broadcast signal for establishing the first communication connection to the master controller and the second communication connection to the slave controller respectively, and the intermediate device receives the control signal through the first communication connection and sends the control signal through the second communication connection.