The invention discloses a construction technology of cold bending glass of a double-curved-surface roofing system. The construction technology comprises the following steps that 1, measuring is conducted, specifically, three-dimensional coordinate measurement is conducted on a double-curved-surface steel structure; 2, calculating is conducted, specifically, a theoretical BIM model is designed according to measurement data, and calculating adjusting is conducted; 3, classification is conducted, specifically, the glass with the warping rate being lower than the determined amount is classified according to a calculated structure and subjected to cold bending machining; and 4, mounting is conducted, specifically, the glass obtained in the step 3 is conveyed to a mounting site. In this way, theconstruction technology of the cold bending glass of the double-curved-surface roofing system effectively solves the problems that a double-curved-surface steel structure surface glass curtain wall is long in production cycle of hot bending glass, large in production cost and difficult to transport and hoist; and by adopting the cold bending glass mounting technology, the production cycle can beeffectively shortened, the production cost is saved, and meanwhile, transporting and hoisting are simple and convenient.