Disclosed are a super cell-based data transmission method and system. The system comprises: a core network device, a first base station connected to the core network device, at least one second base station connected to the first base station through an Ethernet link, and a terminal separately connected to the first base station and the at least one second base station, wherein the first base station and the second base station perform data interaction through the Ethernet link. The present invention at least solves the problem of high network architecture costs and inflexible architecture in the prior art.