Abstract: To eliminate the contradiction between global measurement and local precision control in 3D digitizing of large complex shapes, a combination measurement scheme is proposed, which is characterized by global control means with large space measuring device, and acquiring detail data with terminal close device, as well as global calibration of the system and data fusion of multi-views. In order to calibrate the global measurement control net, observations are performed at a number of sites to acquire redundant data. They are then fed into an optimization algorithm to precisely position the net. In order to uniquely define the measurement foundation during the whole measuring process, a global measurement coordinate system as well as the physical relation to the control network is setup. By means of fixing a number of observing target points on the scanner, a base coordinate system is built for detecting the pose and orientation of the scanner with the laser tracker. Moreover, a coordinate mapping model of the scanner is established, and its high precision calibration is carried out based on measurement adjustment optimization technology. During the measurement, multi-view shape data detail is obtained through moving the scanner, meanwhile the laser tracker performs on-time positioning and posture detecting of the scanner at each site. Combined with observation of the control net, global calibration of data of each local view and data fusion of them are achieved. Experimental results show that the combination measurement and calibration method proposed can effectively expand the measurement space and control the global measurement error. In addition, it avoids interfering with the measurement, due to the fact that additional calibration equipment and operation are no longer needed.