With the development of technology and everyday use of the Internet, e-commerce is an integral part of Internet business. It allows you to easily find a quick and easy purchase. Due to low cost and simplicity, it is considered the most profitable business way. First and foremost, it is necessary to know the design of the web application, and then a design that would attract users and implement all web application functionality in an integral way. The database is the starting point where a good substrate of the integral table structure is placed. With a well-structured data structure and indexing, web applications can work much faster and utilize much less resources. The next step is to create a web application and connect to a database. After that, design is done that provides ease and efficiency in publishing and finding information, and provides clear navigation and connectivity to all parts of the application. To define the layout, MasterPage and CSS style editing were used. When developing web applications, we need to keep in mind the creation of websites that are needed for normal application of the application. Galerija Pašalić je ASP.NET web stranica izrađena je u razvojnom okruženju Microsoft Visual Studio 2017. Pisana je je C# programskim jezikom. Pašalić Gallery was created is ASP.NET web site created in a development environment Microsoft Visual Studio 2017. Gallery is written in C # program language then it . Purchases are made so that the user chooses the art piece he wants to order, then customer puts it in virtual basket. Then we have to login to the system to confirm your order. In the event that the system is not registered, the customer must enter the data within the registration form entry. After that, we'll finish the order with just one click. The simplicity of the page allows users to find the information they require without overcoming their efforts. First of all, confidence and security has to be provided for all users. That's why details of the authors were presented to bring them closer and provide them with a complex view of administrator applications themselves. Getting feedback is a great indicator of product quality and online shopping, so it is possible for users to send feedback on the purchased piece of art. The application should be refreshed, maintained, added to the art and clearly emphasized on the home page. Maintaining web applications and websites is of vital importance as well as design and development phases.