At present, the scientific literacy of Chinese citizens is still at a low level, and it is still a long way to go for the nation to improve its science popularization capability. University science and technology park is a gathering place and transformation hub for its scientific and technological achievements, which is crucial for promoting the national career of science communication. This paper starts from the definition of science popularization capability of university science and technology park. The study illustrates the basic functions of science popularization capability construction of university science and technology park in three aspects: speeding up the transformation university scientific and technological achievements; improving the quality of innovative and entrepreneurial talents cultivation; promoting the scientific literacy of university and local area citizens. The essay also puts forward the ultimate goal for the science popularization capacity construction of university science and technology park. It analyzes its key influential factors on science popularization capability construction: science popularization environment; the popularization ability on science and technology resources; communication skills and operation on science popularization jobs. At last, the paper constructs the evaluation system of science popularization ability of university science and technology park.