The invention discloses an establishment of a historical power grid typical engineering resource database includes collecting historical engineering data, state grid general engineering costs and Electric Power Planning & Engineering Institute quota data, constructing a critical parameter library according to an engineering type, building a scientific and reasonable engineering cost contrastive analysis model by means of informatization, and realizing an intellectualized contrastive analysis for the engineering costs in order to assist the development of a techno-economics assessment. The application of the invention provides a support for an engineering cost management and control analysis. The invention has the advantages of establishing general engineering cost, costs of each engineering phase and costs of engineering with the same scale and similar type to assist comparative censor through an engineering cost database according to an engineering cost management requirement, carrying out engineering cost analysis, concluding rules and experience and providing the basic data reference and support for a subsequent engineering cost job, making full use of data mining technology and depending on the huge engineering cost database.