Due to the virtues of safety and convenience, outdoor wireless charging for electric bikes has been an emerging necessity for citizens. However, during the charging process, the transmitted power needs to be regulated to meet the charging curves of the electric bike-mounted batteries. To realize efficient and controllable wireless charging for electric bikes, a power regulating methodology based on BUCK circuit and infrared communication is proposed. Here, the infrared link is used to feed the charging state of battery back to the controller of transmitter, while the BUCK circuit at the transmitting side is used to regulate the voltage amplitude of the AC driving source, thus regulating the transmitted power. The BUCK circuit at the receiving side is used to protect the battery from the sudden change of transfer distance. With two parameters of charging voltage limit and charging current limit given, the battery can be charged automatically according to its charging curve using the proposed methodology. Besides, the proposed methodology can also realize fast response to distance variation during the charging process.