To improve the concentrate efficiency of the parabolic trough concentrator, the measurement and adjustment of overall surface are needed. The theoretical overlay photographic method is used to measure the installation position and tilt angle of facet mirrors, and then the concentrator surface information is obtained. It can calculate the theoretical shape and position of the receiver in image by measuring the relative position of concentrator and cameras, while the theory position formula of receiver is deduced in concentrator. The experiment of the theoretical overlay photographic method measuring the concentrator surface is done. This method can match the actual position of receiver to theoretical position in image by adjusting installation position of facet mirrors, which verifies the feasibility and correctness of this method.