Bill processing method and related service systems

The embodiment of the invention discloses a bill processing method for ensuring the successful bill transmission efficiency between different service systems, and related service systems. The method disclosed by the embodiment of the invention comprises the following steps: a first service system determines a source bill to be sent to a second service system and stores backup (namely a backup bill) of the source bill in a data pool of the first service system; after the first service system establishes a network communication connection with the second service system, the first service system sends the backup bill to the second service system and judges whether log information is present in the backup bill of the data pool, wherein the log information is attribute information recorded in the backup data of the data pool after the second service system successfully receives the backup data; and if the first service system determines that the log information is present in the backup bill of the data pool, the f