The invention discloses an engineering enterprise information integration management system, which includes a front-end sales system, a back-end supply system, a production planning system, a recording and auditing system which are conneted via a wireless network. The front-end sales system specifically includes a marketing unit that interfaces directly with the customer, and a sales instruction processing unit that receives customer demand instructions directly, A sales order processing unit is mainly used for storing product inventory information, and product association information directlyassociated with the product inventory information, A sales order processing unit transfers sales records to a records review system, and the marketing unit delivers production notifications to the production planning system, The front-end sales system and the back-end supply system can update the data synchronously, and the front-end sales system can directly control the product stock-out, improve the network economy and speed economy of the enterprise information management, integrate the information resources scattered in all levels of the enterprise organically, and greatly improve the abundance and condensation of the enterprise information resources.