Abstract: 【Purpose/significance】Improve the index rationality and result accuracy of the innovation supply capacity of scientific and
technological service institutions【. Method/process】This paper puts forward the evaluation method of innovation supply capacity of sci? ence and technology service institutions based on event tree analysis,and establishes a highly reasonable evaluation index system of in? novation supply capacity of science and technology service institutions from five aspects:technological innovation capacity,economic benefits,future development potential,demonstration driving capacity and capacity utilization.The evaluation model of innovation sup? ply capacity of science and technology service institutions is constructed by using network analysis method to realize the evaluation of innovation supply capacity of science and technology service institutions【. Result/conclusion】The experimental results show that the critical ratio, kurtosis coefficient and skewness coefficient of the evaluation indexes selected by the proposed method are controlled within a reasonable range,and can effectively evaluate the innovation supply capacity of science and technology service institutions.【Innovation/limitation】This paper proposes an evaluation method of innovation supply capacity of science and technology service in? stitutions based on event tree,selects reasonable evaluation indexes,improves the accuracy of evaluation results,and will effectively pro? mote the sustainable development of regional economy.The limitation of this method lies in the lack of comprehensiveness of the re? search subjects,the failure to evaluate the innovative supply ability of some representative industrial information institutions,and the evaluation results are somewhat biased.