The invention discloses a distribution service system used for multiple platforms and a method, and relates to the field of e-commerce. The system includes a distribution platform. The distribution platform includes a distributor information database, a distributor management module, a storage module, a processor, a prepaid-money account, a distribution commodity information database, a distributor sales statistics module, a commodity sales database, a distribution commodity information data receiving module, an information input interface module, a distribution commodity editing module, a distributor level evaluation module, a distribution commodity information data sending module and an information output interface module. According to the system, the distribution platform is designed, the distribution platform is connected with a PC mall, a mobile-phone mall and a WeChat mall, and cooperates with short-message equipment, a logistics information server and a third-party payment server, the distributor management module, the distributor sales statistics module and the distribution commodity information database are arranged in the distribution platform, and thus capability of multi-platform distribution, a distribution management level and representativeness of distribution information are improved.