Data transmission method and system and electronic equipment

The invention discloses a data transmission method and system and electronic equipment. The method comprises the following steps: acquiring a subscription relationship in a predetermined network; determining subscribed predetermined data based on the subscription relationship, determining a sending domain controller for sending the predetermined data from the plurality of domain controllers, and determining a receiving domain access device for receiving the predetermined data from the plurality of access devices; determining a transmission domain switching device through which the predetermined data needs to be transmitted from the plurality of switching devices; determining a sub-domain corresponding to a sending domain controller, a sub-domain corresponding to a receiving domain access device and a sub-domain corresponding to a transmission domain switching device; determining a transmission line of predetermined data according to the sub-domain corresponding to the sending domain controller, the sub-domain