The invention provides a message log processing method and a message log processing system. The system comprises a receiving unit, a processing unit and a database, wherein the receiving unit is used for receiving messages forwarded by a service processing system, wherein the messages comprise original messages and related messages; a judgment unit is used for judging that whether the messages received by the receiving unit are the original messages or the related messages, informing a cache management unit if the messages are the related messages, and caching the messages into a cache unit if the messages are the original messages; the cache unit is used for caching the original messages received by the receiving unit; the cache management unit is used for receiving the notification of the judgment unit, updating information corresponding to the original messages according to the related messages, sending updated messages to the processing unit, and simultaneously deleting the messages in the cache unit; and the processing unit is used for executing database operation. The method and the system can reduce the database operation and improve the efficiency of inputting the data in the database.