Abstract: To resolve the current problems of relative orientation caused by lacking of obvious feature points in applications of industrial and architectural photogrammetry, a new method of relative orientation based on multiple types of conjugate features is proposed on the basis of the theory of generalized point photogrammetry. The models of independent and continuous relative orientation by conjugate lines and circular curves are addressed respectively. Experimental results show that the proposed approach is feasible in practice, and can get reliable relative orientation results even in the case of a few conjugate points.