Since 2016，in order to construct a modern public cultural service system，the government has promulgated a series of public cultural policies and regulations，focusing on building a legalized public cultural service system，improving grassroots public cultural service system and strengthening grassroots cultural service capacity building，and determining the 13th five-year period of cultural development reform plan.The observation of public cultural policy experimental base indicates that，the public cultural institutions in the experimental base are more obvious and motivational than those of other institutions under the national cultural policies，of which service capacity is faster than that of other institutions.The activity of social participation in public cultural service has improved steadily，and the funds of free admission are basically available.And it also found that some institutions began to show diminishing marginal utility in public input and the format of the cultural products supply model did not adapt the cultural consumption model of citizen's own choice.It is recommended to further research and formulate the implement details of central government policies to achieve implementation，to guide the social forces to build，to innovate the mechanism system of public cultural service system，to optimize the concept and method of financial input.Meanwhile，to strengthen the input-output performance evaluation of public cultural institutions，and establish the rewards system which is performance evaluation results oriented.