A backend architecture method includes: acquiring transaction information from a client, wherein the transaction information includes location information of the client; assigning, based on the location information, the transaction information to a transaction node that has jurisdiction over the location information, wherein the transaction node is a transaction center within a specified region in a distributed transaction system; matching, according to the transaction node, a channel gateway in a channel docking layer that pre-establishes a connection relationship with the transaction node, and sending a transaction request in the transaction information to a transaction object over the matched channel gateway such that the transaction object processes the transaction request; and acquiring a processing result from the transaction object, and transmitting information of the processing result to the client.