Ecological restoration of territorial space is an important measure to implement the concept of ecological civilization construction, and accurately identifying ecological restoration areas is a difficult point in carrying out the ecological restoration of territorial space. Taking the Chang-Zhu-Tan metropolitan area as the research area； we used methods and models, such as the water balance equation, InVEST model, and circuit theory； combining ecological degradation risk assessment with ecological security pattern construction； accurately identifying the ecological conservation area and ecological restoration area of the ecological source area, ecological corridor, and stepping stone； and proposed strategies for ecological protection and restoration of national land space. The results indicated that： ① The ecological degradation risk in the study area substantially showed a "medium high and low weekly" spatial pattern. ② A total of 74 ecological source areas were identified with a total area of 5 425.21 km