The Universal Networking Language (UNL) deals with the communication across nations of different languages and involves with many different related discipline such as linguistics, epistemology, computer science etc. It helps to overcome the language barrier among people of different nations to solve problems emerging from current globalization trends and geopolitical interdependence. Case structure analysis forms the foundation for any natural language processing task. In this paper we propose the computational analysis of the Bangla case structure and conversion of Bangla sentence to UNL expression. We also provide the implementation of our analysis taking one of the cases as an example.