The invention belongs to large-size measuring technology, aims to acquire scanning light face structure parameters fitted with its actual shape and can improve measuring accuracy of a wMPS system. A three-dimensional coordinate reference field indoor space measuring, positioning and scanning light face calibration method includes: using a laser tracker to measure global control points under multiple stations, and cooperating with a weighting algorithm for optimizing measuring angle errors to acquire a three-dimensional coordinate reference field; taking coordinate field reference as referencefor wMPS scanning light face calibration of an indoor space measuring and positioning system; arranging an emitting station, and measuring and recording moment of each scanning light source when passing each control point; taking a quadric surface as a typical model with scanning light face more fitted with actual shape, establishing a constraint equation through coordinates of the control pointsin reference field space, combining with other constraints, using a least square method to resolve parameters of the scanning light face, and taking the parameters as intrinsic parameters of a wMPS single emitting station for reconfiguration. The method is mainly applied in large-size measuring occasions.