Full-link account checking method and account checking system

The invention provides a full-link account checking method and an account checking system. The method comprises the steps that reconciliation files of all service systems are received, the multiple reconciliation files are generated in a unified reconciliation file format, the reconciliation files comprise time period summary files and reconciliation flow files, the time period summary files are reconciliation flow summary files, received by an error processing system, of the service systems in a certain time period, and the reconciliation flow files are generated in a unified reconciliation file format; the reconciliation flow file is a reconciliation detail file of each business system; and based on the global business tracking identifier of each transaction event, checking the plurality of reconciliation flow files on the whole link to obtain the state of each transaction event passing through each business system on the whole link, the state being a transaction success state or a transaction failure state