The present invention discloses a cross-protocol distributed cloud storage system based on a network node operation control unit. The distributed cloud storage system includes a plurality of network nodes, each of which includes an operation control unit that directly interacts with a data link layer, the operation control unit including a file unit, a network information management unit and a resource scheduling unit, wherein the file unit is used to mange and store file information of the network node where it is located; the network information management unit is used to interact with the data link layer so as to perform link scheduling for delivering the information between the network nodes, and to update data between the nodes; the resource scheduling unit is used to allocate and schedule hardware or network resources for the network information management unit and the file unit for implementing functions thereof.