The coordinated governance of public services in Beijing-Tianjin-Hebei is a key measure to make up for the huge gap of public services in the three regions，the top priority of the coordinated development of Beijing-Tianjin-Hebei in the new era，and the necessary measure to meet the needs of the people’s better life. In this paper，the entropy method is used to measure the public service level of Beijing-Tianjin-Hebei，the variation coefficient method is used to analyze the gap of public service level，and the influencing factors of public service level are analyzed by panel regression model. It is concluded that from 2010 to 2017，the public service level of Beijing-Tianjin-Hebei has improved in general，but the gap of public service level was widened. After the collaborative development of Beijing-Tianjin-Hebei was put forward in 2014，the growth rate of the gap has decreased in general，and government policies and people’s living standards have promoted the public service level of Beijing-Tianjin-Hebei. On this basis，the paper puts forward corresponding countermeasures and suggestions based on the experience of collaborative governance of public services in metropolitan areas of developed countries.