Because the enterprise does not have the perfect management information system, at present EVA's calculation value is not quite accurate, and some advanced enterprises abroad still have certain disparity. Because the calculation of Eva Index needs to collect a lot of data, so in order to accomplish this task successfully, we must have a strong and perfect management information system. The first step is to create a management information system that aggregates data, simplifies the collection of data and ensures the authenticity of the data. The second step is to set up a management information system covering the whole group company, and implement Eva Index Evaluation System in the system. The evaluation results include not only the business performance of the enterprise, but also the performance of each department, Organization and staff. The evaluation is based on data and information provided by the enterprise, both financial and non-financial, and the system allows statistical analysis of the respective EVA values and the contribution of those departments, organizations and personnel to operational performance.