Abstract: Under the background of prominent contradiction between economic construction and environmental protection, it is of great significance to examine the spatiotemporal evolution characteristics of regional greenspace system and analyze the effects of human factors on ecological services of greenspace system, which would facilitate the improvement of greenspace resource management and the promotion of sustainable and coordinated development of the region. Based on the methods of landscape ecology and the equivalent factor evaluation of ecological service value, using the spatial analysis function of software ArcGIS 10.2, we analyzed the spatiotemporal evolution characteristics and ecological service value of the greenspace system in the core area of the Yangtze River Delta from 1990 to 2015. The results showed that: (1) The temporal changes of greenspace landscape area in the core area of the Yangtze River Delta had the stage characteristics, with a trend of first expanding and then decreasing. The transformation between greenspace landscape and other land use types had the characteristics of stage and directionality. As a whole, the landscape pattern of greenspace was homogeneous in the initial stage and heterogeneous in the later stage. (2) The value of greenspace ecosystem services in the core area of the Yangtze River Delta showed significant temporal changes, with different greenspace landscape types having different stage characteristics. Among all the types of ecosystem services, regulation services contributed most to the overall ecological service value of the greenspace system. (3) The value of greenspace ecosystem services exhibited imbalance between the north and the south of the region, being higher in the south and lower in the north. Among them, the value of greenspace ecosystem services in Hangzhou was the highest at different stages. Regional topography and geomorphology were important factors affecting the value of regional ecological services.