Abstract: A combined method of experiment-boundary element is suggested for stress analysis in photo-orthotropic-elasticity, and a corresponding program system BEMSC is developed. One item experimend ata(isochromatic line) is only needed by applying the method. It is also applicable to the problem of photo-orthotropic-elastic analysis for the modd m at erials with residual stresses. An example of stress analysis is given in photo-orthotropic-elasticity.