The accounting service system is composed of three parts: accounting calculation, accounting analysis, and accounting inspection. It includes contents such as bookkeeping, accounting, financial reporting, using accounts, and auditing. Among these, the accounting calculation methods include setting up accounts, double-entry bookkeeping, preparing vouchers, recording ledgers, cost calculation, asset verification, and accounting statements, etc., which are methods for bookkeeping, accounting, and financial reporting. The purpose of these methods is to provide necessary data and information for management and decision-making.