The invention discloses a method for evaluating economic and technical indexes of an engineering project. According to the method, the assisting reviewing function on a transmission and transformation project is achieved by establishing an engineering project key index system and applying an intelligent analyzing method and an engineering project cost key index comparing method. Monitoring and managing of the whole transmission and transformation project reviewing process are achieved in an information-based system from the pre-reviewing of the transmission and transformation project to end reviewing of the transmission and transformation project. The key index system comprises a transformer substation engineering key index and an overhead line engineering key index. According to the intelligent analyzing method, historical engineering similar to target engineering and a general design module are automatically matched by screening engineering project key parameters, the cost difference is visually displayed by comparing the key engineering economic and technical indexes, and data support is provided for evaluation experts to review the project engineering in an intelligentized mode. The method is suitable for reviewing of an evaluation system for the economic and technical indexes of the engineering project.