Controlling system for electric bicycle and method thereof

A controlling system for an electric bicycle, which is connected to a controller area network (CAN) bus of the electric bicycle and a controlling end, and configured to control a plurality of electric elements which are signally connected to the CAN bus, and the controlling system for the electric bicycle comprising:

• a dongle module comprising:
• a first connecting port connected to the controlling end, wherein the controlling end is configured to transmit a universal serial bus (USB) signal to the first connecting port;
• a dongle, wherein one end of the dongle is coupled to the first connecting port, and the dongle is configured to convert the USB signal into a CAN signal;
• and
• a second connecting port coupled to another end of the dongle;
• and
• a console comprising a console port, wherein the console port is detachably connected to the second connecting port and coupled to the CAN bus;
• wherein the CAN signal is transmitted to the CAN bus via the second connecting port and the console port.