This paper deals with the Qt framework and how it can be used in the development of a multiplatform C ++ desktop application with a graphical interface on the example of an image gallery for Windows, Linux and Mac. The first chapter discusses the basics of Qt classes and user interface design in general and using the Qt Designer tool. The rest of the work is the development of the application itself whcih is divided into three main parts - data processing, user interface development and application packaging. An overview of Qt’s Model/View architecture is also provided here. For the data processing segment, an SQLITE database is created which is then linked to the data classes for the two main objects in the image gallery application - album and image. The user interface is the most comprehensive part of the work and covers the design of forms for viewing albums, images in the album and individual images, and then connecting them with previously created logic from data processing. Finally, scripts are created to package the application for Windows, Linux, and Mac OS X.