The antenna,solar sails and redar arrays in spacecraft made of different gossamer materials are developed widely in space technology.The conventional measurement methods cannot reach the demand of these large-scale and flexible structures.The vision measurement method can be considered as the optimal solution in the profile measurement of gossamer spacecraft because of its advantages of noncontact and rapid data acquisition.A videogrammetric system for a 3.5 m diameter gossamer inflatable antenna is presented.There are three steps in the measurement procedure:the computation to 3-D coordinate of measured points,the least square fitting of the profile of gossamer inflatable antenna and the precision analysis.The relative accuracy of 1/2 000 can be achieved.