Abstract: 【Purpose/significance】Research on the measurement system of communication influence of public cultural service plat⁃form(PCSP) will help optimize the means, forms and operating mechanisms of the platform’s development.【Method/process】This pa⁃per refers to the existing research results and combines the characteristics of the information dissemination of PCSP to form measure indices. It uses the combination weighting method integrated analytic hierarchy process and entropy method to determine the weight of each index and completes the construction of the measurement system of communication influence of PCSP. It applies the system to measure the communication influence level of WeChat public accounts of provincial public libraries in different regions of China.【Re⁃sult/conclusion】Content characteristic is the key factor affecting the communication influence of PCSP, and the communication influ⁃ence level of the WeChat public accounts of the provincial public libraries in Central China, East China and Northwest China is rela⁃tively high.【Innovation/limitation】This paper only uses the operating data of the WeChat public accounts of the provincial public li⁃braries to conduct experiments, and the experimental data is not rich enough.