Accounting information system is a system that processes data and transactions to generate useful information for planning, controlling and operating a business. Currently there are still companies that have not implemented an accounting information system one of them is PT XYZ. The recording process at this company still uses manual recording which impacts on the unintegrated performance and the level of data and validity that does not run as expected and the needs of the company. The purpose of this research is to analyze and design the accounting information system sales and inventory that runs and identify the needs and requirements of new systems created so as to improve the weaknesses in the system sales and inventory. The research method used is the analysis and design by doing problem analysis in the running system and then design the flowchart and prototyping of the appropriate system to be applied in PT. XYZ. In analyzing the existing procedures, conducted interviews on related parties at PT. XYZ. The results obtained obstacles and problems in the manual system that runs related to the performance and processes that occur mainly in sales and inventory. In this study resulted in an accounting information system design that is adjusted to help the problems faced by PT. XYZ mainly on sales and inventory recording.