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This paper studies the indoor three dimensional (3D) measurement method based on binocular technology, and acquires the 3d information of the indoor target, which is used for indoor 3D measurement, 3D positioning and extraction of target depth information. Based on the principle of binocular parallax triangulation, this method calculates the depth information of indoor targets by using Zhang Zhengyou’s checkerboard calibration, Bonguet stereo rectification algorithm, region-based stereo matching algorithm BM (Block Matching) / SGBM (Semi-Global Block Matching) and other technologies. After measurement, the experimental results meet the expected error. The error causes are analyzed from calibration error, experimental environment error and algorithm error, which provide a direction for improving the measurement accuracy and reducing the error in the future.