Construction management system and construction management method

This construction management system is provided with: an image data acquisition unit for acquiring image data indicating an image of a construction site at which a work machine operates; a topographic data storage unit for storing topographic data indicating the three-dimensional shape of the topography of the construction site; a person determination unit for determining a person in the image; a two-dimensional position determination unit for determining a two-dimensional position of the person in the image; and a three-dimensional position specifying unit that specifies the three-dimensional position of the person in the construction site on the basis of the two-dimensional position and the topographic data. 本发明的施工管理系统具备：图像数据获取部，其用于获取表示作业机械工作的施工现场的图像的图像数据；地形数据存储部，其用于存储表示施工现场地形的三维形状的地形数据；人员确定部，其用于确定出图像中的人员；二维位置确定部，其用于确定图像中的人员的二维位置；以及三维位置确定部，其基于二维位置及地形数据来确定施工现场中的人员的三维位置。