In the era of urban competition driven by globalization and informatization，to enhance city image through new media platform is an important way to promote Beijing international influence，as well as an essential approach to build Beijing as the center of exchange. Data analysis based on 7，627 tweets of four cities Twitter accounts，including Beijing @Visit Beijing，@Beijing2022 and Tokyo @Tokyo Arts&Culture，@Tokyo2020，shows the distinct image of Beijing and Tokyo on Twitter. Beijing’s official account also shows a better momentum. However，compared with Tokyo，Beijing’s city brand communication matrix is not complete，and its sense of “presence” is weaker than Tokyo’s. Besides，both the cities’ accounts need to improve in terms of the interactivity and influence.