The development of the Automatic Sale System on Web makes possible the control and the management of sales of any type of product of a company, carried through way web. The intention of the System is to allow the automatic accompaniment of the sales' sector of public or private institutions, avoiding the slowly and inexact caused by human work. The System makes possible the control of the products acquisition, done through the virtual store, manages the customers cadastre and the necessary information for the payment of acquired product and, in the case of softwares that needs constant updates, manages the sending of these updates and sends automatic email informing to the customer the expiration of its license of use. KEYWORDS Automatic management, automatic accompaniment, sale and post-sale on web, product acquisition, virtual store.