Architecture Engineering and Science

3D laser scanning technology, with its characteristics of high efficiency, high precision and non-contact, has become an important tool in the field of building measurement. This paper takes the international student apartment of Liaoning Science and Technology University as the research object and uses the Southern SPL-500 3D laser scanner to conduct on-site point cloud scanning of the international student apartment. After field scanning, point cloud processing was carried out using SouthLidar Pro and Trimble RealWorks software. Subsequently, the accuracy of the building side length was inspected using the prismless mode of the 1 "total station. The experimental results show that multiple factors such as building characteristics, environmental factors, and human factors all have an impact on the measurement accuracy and need to be comprehensively considered. In the future, the measurement accuracy of buildings can be further enhanced by optimizing the accuracy assessment methods and improving the technical level.