This technology uses 3D imaging and AI deep learning to build a "Digital Imaging System for Animal Body Size Measurement and Body Condition Scoring," which is applied to dairy cows and breeding pigs. For dairy cows, the system combines 2D and 3D images for BCS scoring, effectively reducing interference from coat patterns and dirt, improving recognition accuracy and stability, and assisting in assessing health and nutritional status. For breeding pigs, it uses 3D cameras to measure body length, body width, body height, chest depth, waist depth, and body surface area, etc., within 15 seconds while the pigs are walking. This expands the range of measurement items, reduces labor costs and the risk of employee injury, while also promoting animal welfare and improving the efficiency of precise breeding and selection. The overall technology integrates diverse data to advance the intelligent development of the livestock industry.