Business document-based bad debt preparation counting and extracting calculation method and system

The invention discloses a bad debt preparation counting and withdrawing calculation method and system based on business receipts, belongs to the technical field of ERP financial management, and aims to solve the technical problem of how to carry out counting and withdrawing processing by taking the business receipts as data carriers in a business and financial integrated ERP mode. Comprising the following steps: constructing a fund property data dictionary for recording fund properties; constructing a mapping table for representing a mapping relation between the fund property and the accounting subject; constructing a calculation and extraction scheme dictionary, wherein the calculation and extraction scheme dictionary is used for supporting a user to define calculation and extraction proportions of different time intervals; and executing bad debt preparation counting and extracting business operation: after a business document is acquired, matching a corresponding counting and extracting proportion from the