The present invention relates to the field of Internet, and provides a hotel booking cancellation method and a booking cancellation system. The method comprises: recording and displaying room booking cancellation information, a room booking price, and stay duration inputted by a client; determining whether another client pays the room booking price in full according to the room booking cancellation information during the stay duration; if not, maintaining the original status; and if yes, eliminating the room booking cancellation information, the room booking price, and the stay duration inputted by the client, and returning the amount of the room booking price to an account corresponding to the client. By matching a hotel room booking cancellation demand of a user with a room booking demand of a potential user, the present invention can timely publish room booking cancellation information when a client cannot check in for some reasons after booking a room, reduce the possibility of waste due to that the clien
