With the rapid development of e-government and the “Internet + government” project，open government data is one of the most important component attracting great attention. And，relevant investigations and evaluations rise. However，their results vary a lot due to their different methods. And，most of them only focus on the national level，while there is a lack of research to the local government. From the perspective of public demand side，this study constructs an evaluation framework including four dimensions：content，service，usability，and interaction，and analyzes the current status and problems of open government data in four cities：New York，London，Beijing and Qingdao. The study finds that，there exist problems such as poor quality of data，less timely update，low public use rate and poor government response. These problems need to be well addressed to promote the open government data level in the future.