It is about Intelligent Bike using AI based on riding conditions. It is able to collect and transmit multiple sensor data to the cloud database, and the real -time sensor information is used to analyze for an appropriate riding state through random forest. Our performs automatic gear shifting using inexpensive sensor components and embedded system development board, which is not available in current expensive electronic shifting systems.The function and the installation of the external components can be carried out on the o-the-shelf bike with a shifting line, without the need to dismantle or modify the basic equipment. The system also includes an Intelligent bike specific online management interface that allows all cloud data to be displayed and let users access and understand their riding conditions.