Provided are a data distribution method and device, and a storage medium and a system. The method may comprise: receiving an access state report sent by at least one access device, wherein the access state report comprises multiple pieces of network state information for characterizing access networks provided by the corresponding access devices; and determining, based on network state information about access networks provided by various access devices and a data stream to be transmitted, data distribution amounts corresponding to various access devices. Accordingly, multi-connection data transmission control is carried out for a data stream to be transmitted, so as to improve the throughput of service data.