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Inclined photogrammetry has proved its unique and indispensable value in many application scenarios due to the advancement of modern measurement technology; with the support of geographic information and geographic information system (GIGIS) technology, the research is dedicated to combining inclined photogrammetry and airborne light detection and ranging (LiDAR) technology, aiming to achieve more accurate and complete building measurements; GIGIS-based tilted imagery technology is adopted to acquire rich texture and color feature information and airborne LiDAR technology was used to obtain high-precision and low-noise point cloud information, thus optimizing the application of LiDAR in building surveying; through the optimization of point cloud feature extraction and fusion methods, the improved feature extraction accuracy reached 93.56% and 92.14% in two different regions of the test, which are significantly higher than the pre-improvement; the study provides building surveying with more accurate The study provides more accurate and complete features of multi-source data for building measurement, and provides a valuable solution for the progress of building measurement technology.