As an important part of urban public space,city park can give pleasure to human senses, if the landscape is harmonious and natural. So it is necessary and meaningful to do more researches on visual landscape quality assessment of city parks. Scenic beauty estimation method as the most stringent and reliable among the methods of visual landscape assessment has been proved by many studies that the existence of a high degree of consistency between the different landscapes evaluators. So with these two methods combined, the aesthetic differences of participants who came from different majors and the significant factors affecting visual landscape quality of city parks were analyzed by first selecting 42 landscape photos of Zizhuyuan park and scores of 6 factors with expert evaluation method and by conducting a questionnaire survey to get scores of 3 subjective factors and overall of each photo with the method of scenic beauty estimation,then making consistency test using Excel 2007 and making analysis of variance and regression analysis using SPSS19.0. The final results showed that:1the three subjective factors determined by the article,the results acquired by field evaluation and those indoor evaluation synchronously show that visual landscape assessment has the consistency; 2variance analysis of the data shows that different professions, different backgrounds of participants have no impact on assessment to the aesthetic of city park, further validation that visual landscape assessment has the consistency; 3the proportion of natural landscape in the park, permutation and combination of natural landscape in the park, the coordination of landscape building and natural landscape in the park have played positive role on visual landscape quality of Zizhuyuan park;4the influence of factors in the park are more serious than the one outside the park for participants, and proportion of natural landscape inside the park is the most significant factors to affect visual landscape quality of city parks.