The present invention discloses a transparent thermal insulation coating material system for a glass substrate. The coating material system is a double layer coating material system formed by a separately-prepared primary coating and a separately-prepared surface coating, wherein the surface coating is coated on the primary coating, the primary coating comprises the following components, by mass, 0.05-3 parts of a silicane coupling agent or a titanate coupling agent, 0.2-5 parts of a hydrolysis catalyst, and 95-99 parts of a solvent, and the surface coating comprises the following components, by mass, 50-80 parts of a light curable resin, 5-35 parts of an active diluent, 1-8 parts of a photoinitiator, 5-35 parts of an antimony tin oxide nanometer thermal insulation powder slurry or an indium tin oxide nanometer thermal insulation powder slurry, 100-140 parts of an inert diluent, and 0.01-0.15 part of a leveling agent. With the coating material system, a film can be formed through a conventional film forming method, and the film layer can be cured within a few seconds after ultraviolet light irradiation. In addition, the coating material system has characteristics of high hardness, excellent adhesion and excellent water resistance.