The invention discloses a control method and device for a password changing operation. The method includes: acquiring operation behavior information in a process of executing the password changing operation on a predetermined page, wherein the password changing operation is used to change a current password of a first predetermined account; judging, according to the operation behavior information, whether the password changing operation belongs to illegitimate operations, and obtaining a judgment result; and carrying out control, which corresponds to the judgment result, on the password changing operation. The method solves the technical problem of poorer user password security in the process of executing the password changing operation in the related art.