The invention discloses a construction health monitoring system based on three-dimensional laser scanning technology. The construction health monitoring system includes a measurement data acquisition and preprocessing module, a data analysis module and an intelligent forecasting module. Construction data acquired by the data acquisition and preprocessing module are analyzed and processed in the data analysis module. The intelligent forecasting module combines the data analysis results and the data acquired by the data acquisition and preprocessing module for comprehensive analysis so as to perform construction monitoring and evaluation. The invention acquires data through the three-dimensional laser scanning technology, reconstructs scanned entity completely and accurately and quickly obtains original surveying and mapping data, a more accurate and realistic three-dimensional model can be established, the time and cost for the acquisition process are greatly reduced, and the invention is highly operable, has a high application value, can be widely applied to detection and evaluation of bridges, houses, subways, coal mines and the like, and has a wide range of applications.