In order to meet the needs of different analyses of certain petroleum corporation's economic benefit of the petroleum projects in a better way, the paper analyzes the system requirements in the view of business restructuring, guides the design and implement of the platform in the idea of workflow and modularity. So that the system can have good flexibility, usability and maintainability. This system can meet the demands of various analysis and evaluation and has the characteristics of effective adjustment at any time though defining and maintaining models by the workflow model designer based on JGraph. Simple and effective process engine ensures the normal operation of the process, and at the same time, the guide of users' operation can help avoid improper operations. It has been proven that the platform's design is preferred in the corporation's practical application.