With the development of society， the scope of public health services is becoming larger and larger. Based on the responsibility system of family doctors， a new system is established to provide new policies. Each community takes the family doctor as the core， establishes a family doctor service team， and establishes a stable service relationship with residents by signing a contract. On the basis of forming a contractual relationship， it provides continuous and comprehensive public health services for residents， which fundamentally solves the health problems of the vast majority of residents. Based on the family doctor responsibility system， this paper studies the mode of public health service， analyzes the organizational structure and collaborative mechanism in detail， and puts forward countermeasures according to the problems found， such as incomplete family doctors， lack of service ability， etc.， improving the organizational structure of family doctors and optimizing the content of contract signing， so as to increase the innovation of public health services of the community， improve the service quality and complete service evaluation.