Several cameras are used in three-dimensional（3D） measurement system with linear-structure light, to measure whole profile and partial detail of complex object with high-precision and 360° measurement range. A measurement system , which is composed of four cameras, has been developed . A new calibration method is presented to calibrate the cameras simultaneously. It uses direct linear transformation model and a self-designed drone control field with many control points to calculate the model parameters, and adopts duality interpolation to rectify the 3D coordinates of measured object . The calibration process of the system is particularly described . Furthermore, a novel method, which is based on two-dimensional discrete Fourier transform, to extract multi-resolution control points on drone is introduced. The result shows the method can calibrate several cameras synchronously for multi-sensor measurement system.