In my BSc thesis we presented model language Archimate and its practical use. Firstly, we presented the language basics, its characteristics, structure and different viewpoints. Secondly, we presented business information technology for mobile banking. We analyzed and presented software as a service and practical use of Archimate language and its viewpoints. We presented the database and entity relationship diagram in Martin’s notation for mobile banking application from the side of the bank. In the next part, we presented the process of logging into the mobile banking application and security, necessary at the login and during application management. There are many different ways of login. Security must be provided by the bank, as well as by application provider. The application cannot fully work without being connected to the bank, therefore, in the last part of the thesis we described all web services needed for proper operation of the application. Application users can perform the same procedures and processes through web services as they would do at the bank counter. The advantage being that the procedures and processes can be done any time, any day of the year. At the end, we stated conclusions in relation to the objectives set in the thesis.