Stock information system is one of the important systems in a company. This system serves to manage and control the stock of goods in the company. One technology that can improve the efficiency and effectiveness of stock information systems is barcodes. Barcodes are two-dimensional matrix codes that can store large amounts of information. This research aims to design and build a stock information system using Android-based barcodes. The system is built using PHP and MySQL programming languages. The results of the study show that the stock information system using Android-based barcodes can increase the efficiency and effectiveness of stock management. Barcodes can be scanned using a tool that emits infrared light and is reflected by black and white lines on the barcode. This information is then decoded by sensors in the scanner and converted into numeric and letter codes. The data obtained will be submitted to a computer device or other system for further processing, such as recording transactions. This system can be used to reduce time and costs in managing stock.