Abstract: A combined adjustment system of photogrammetric and non-photogrammeric information mainly for close-range photogrammetry(called CAS-C) has been developed by the author on a computer(VAX-11/750) after a thorough investigation of the fundamental theories of combined adjustment.The system almost has all the sophisticated functions which an advanced present-day photogrammetric adjustment program should have,e.g.automatic gross error detecting,systematic error compensation,simultaneous adjustment of different kinds of observations,etc.In this paper CAS-C will be introduced in terms of its theory,its functions,and its structure,etc..An example is presented at the end of the paper to show the effect of the combined adjustment.