Street planters serve as a crucial form of micro urban regeneration, especially well-suited for flexible use in the limited spaces of urban core areas. Current research primarily focuses on planter materials, maintenance management, and development prospects. The primary functions of these planters are to blend in with their surrounding environment and enhance the quality of public spaces. However, the methods for evaluating the scenic beauty of these factors and the factors that influence it remain unclear. This study conducted investigations on 45 typical street planters in Shanghai. Utilizing the SBE method, a scenic beauty evaluation system for street planters was established, and a relational model between scenic beauty and influential elements was created. The results show that the aesthetic appeal of typical street planters in Shanghai ranges from 0.69 to 2.09, with an average value of 1.41. This indicates that the overall landscape effects are generally good. The factors that significantly affect the scenic beauty of the street planters are fourfold. Ordered from high to low according to the degree of influence, the factors are planter texture, aesthetic appeal of plant morphology, harmony between plant volume and planter, and plant planting density. The research results provide a theoretical and scientific basis for estimating the scenic beauty and constructing public space street planters.