A database modernization auditing system and method is disclosed. One embodiment comprises a method for loading a legacy data object, transforming the legacy data object into a modern data object according to a rule set, wherein transforming the legacy data object into the modern data object further includes abstracting at least a portion of the legacy data object into semantic information and transforming the semantic information into the modern data object, and generating an audit log entry corresponding to an error that occurs while transforming the semantic information into the modern data object, wherein the audit log entry contains a unique identifier that relates the audit log entry with the legacy data object.