Disclosed are a regulating method and system for a contactless transformer, applied to a regulating system including a contactless transformer and a detecting device (2), wherein the contactless transformer includes a transmitting end (11) and a receiving end (12), and the method includes: using the detecting device (2) to detect power transmission parameter information between a transmitting coil (111) and a receiving coil (121) of the contactless transformer, and a transmitting end controller (113) regulating operating parameters of a power transmitting end circuit (112) based on the power transmission parameter information; a receiving end controller (123) regulating operating parameters of a power receiving end circuit (122) based on the power transmission parameter information.