Nowadays, brands and advertisements have become the focus of the market. As an important part of business strategy, brands and advertisements are playing an increasingly important role. How to use advertising and brand strategy has become a topic worthy of exploration by enterprises. In this paper, the author adopts the method of case analysis. Firstly, starting from sorting out the brand and advertising theory, starting from Yili's Olympic advertising activities, the author analyzes the concept and effect of Yili's Olympic advertising activities, and comments on the success of Yili's Olympic advertising activities, so as to provide some reference for enterprises to carry out advertising activities better.