The flower border in 20 parks in Shanghai was selected as the research object, and the importance-performance analysis (IPA) was used to evaluate the landscape from four dimensions: the basic structure of the flower border, landscape design, plant materials, construction and maintenance, to explore the satisfaction of tourists and professionals on the flower border of green space in the park, and to analyze the problems existing in the construction of flower border and the direction of key improvement in the future. The results show that: (1) The overall satisfaction of tourists and professionals to the flower border is more than 3.5 points, which shows that they are relatively satisfied. (2) In terms of the basic structure, the comprehensive importance of the two groups of people is higher, tourists are more satisfied, while professionals are lower, and the satisfaction of viewing distance of the two groups of people is the lowest. (3) In terms of landscape design, the comprehensive importance of tourists is low, which shows that they are more satisfied than expected. The comprehensive importance of professionals is high, and their satisfaction is low. The average importance of color design of the two groups is the highest, and the design of the flower border viewing period is the key index to improve. (4) In terms of plant materials, the comprehensive importance and satisfaction of the two groups of people are higher than 3.5, and the scores of tourists are higher than those of professionals, among which the colors and patterns need to be improved first. (5) In terms of construction and maintenance, tourists’ comprehensive importance is less than 3.5, and they pay less attention to construction and maintenance. Both groups of people are relatively satisfied. The analysis shows that the flower border with interactive, bright colors, prominent flowers and considerable seasons is easy to be loved by the public. The viewing distance, color design, flower type, viewing period design and popular science education function of the flower border should be optimized in the future.