During laser gear measurement, the laser beam typically intersects the gear′s center, measuring the spatial distance from the laser displacement sensor to the involute tooth surface. However, the substantial angle between the laser beam and the normal vector of the measured tooth face compromises measurement accuracy and data stability. To address this issue, this paper proposes a laser offset measurement method for gears. By offsetting the laser beam from the gear axis, the angle between the laser beam and the tooth surface normal vector is reduced, thereby enhancing measurement accuracy and stability. The paper calculates the optimal offset range and analyzes gear pitch deviation and helix deviation by examining gear tooth shape. Theoretical projection and experimental verification confirm the method′s advantages of high accuracy and minimal data fluctuation, rendering it suitable for highprecision gear measurement.