Construction project cost auditing system and method

The embodiment of the invention discloses a construction project cost auditing method. The method comprises the following specific steps: establishing an engineering file auditing model based on comparison auditing and editing auditing, generating two kinds of form data of submission and auditing from external and internal engineering files, and establishing an association relationship between thetwo kinds of form data of submission and auditing through a data matching rule; establishing an item adding mark, an item deleting mark and an item changing mark by utilizing a calculation rule; carrying out color rendering on marks of added items, deleted items and modified items calculated according to calculation rules to form data display of a software interface, wherein the auditing system comprises a model processing module, a rule base module, a data marking module and an interface display module; the data matching relationship can be automatically screened and established through thematching rule and the calc