Management Systems are usually designed to enhance the efficiency of handling the information of any system, which is running through an inefficient procedure and is expensive, time consuming, insecure and it needs more manpower. The Online Garments Inventory Management System is a system which makes the working procedure of present manual system of Garments easier and increases its efficiency to a high degree. The main objective of this application is to automate the existing system which is manually maintaining. The whole system is accessed from different terminals of the network. There are three major sectors in this system- employee management, product inventory and raw materials inventory. In the employee management system all information of the employees are stored. In the product inventory system, the invoice and the delivery information is maintained. Raw materials inventory controls the purchase information, shipping information, total materials of stock in the garments. The Entity Relationship model is used to design the database that will store and organize the garments data. The data is stored in MySQL Database Server and populated it with some sample data. Using HTML, PHP, Java Script and CSS, an internet based graphical user interface has been created that allows garments authority and administrator to access the system remotely.