Three-party data check method and system

The invention relates to a three-party data check method and system, wherein the method comprises the following steps that: a financial management and control system collects daily transaction data through a banking system and generates one unique identification code for a successfully collected transaction record; the financial management and control system pushes screened transaction data to a service management and control system; the service management and control system pre-splits the transaction data pushed by the financial management and control system, checks the split data with related data stored in the service management and control system, and pushes a successful check record to the financial management and control system; the financial management and control system receives the data pushed by the service management and control system and matches the data with the collected data pushed to the service management and control system before according to the identification code; and the successfully matched data are checked with a data receipt of a bank. According to the invention, online three-party check is realized; the financial system obtains a bank current account through direct connection between the bank and an enterprise; after being processed, the bank current account is pushed to the service system; and the service system pushes the bank current account to the financial system after completing service processing.