Due to the sustainable development of river system has been threatened, as the ecological function was decayed; more attention has been paid to the improvement of ecological environment, one prominent example is the river regulation and its environment construction. Besides flood protection, river can also create the plentiful habitat and unique regional culture by optimizing river regulation pattern. Therefore, the research on how to restore damaged river ecosystems to healthy status has become one of the important environmental issues urgent to be solved. Functional regionalization is the prerequisite for appropriate restoration, which can provide scientific basis for the goal of ecological restoration. In this paper, the Songhua River in Harbin is selected as a study case. Based on the theories of ecological function regionalization and the current situation of the Songhua River area, four-dimensional structure planning on the spatio-temporal scale of river corridor is developed in this paper, including longitudinal, lateral, vertical and temporal dimension. Considering the Songhua River area has typicality of characters in different time, with distinct four seasons, and the winter is very long, a detailed study and deeply analysis is discussed, then, measures for restoration and management are put forward.