The invention discloses an online service transaction platform. The platform comprises a client and a server. The client is connected with the server through the Internet. The client uses a PC and a mobile terminal to input or check. The server comprises a server side and a server side, the enterprise and user management module is used for integrating a financial management system, a human resource management system, an administrative comprehensive management system, a file system, a contract management system, an information management system, a training management system, a conference management system, a business system, a sales and project management system, a storage system, a supply chain system, an operation system and other related modules of the system. The invention provides a management system for enterprises. A brand-new management mode is established, enterprises are allowed to enter for realizing management, a platform provides various service provider business managementsystems, service providers are helped to establish a new business mode, collaborative docking of the enterprises and the service providers is realized on the platform, online service is realized, andthe platform provides service and transaction systems for the service providers and the enterprises and is not limited by regions.