The invention provides a glass roof structure used for the installation of photovoltaic panels. The glass roof structure is characterized in that the glass roof structure comprises a purlin, a waterproof component, a plurality of U-shaped glass plates, and a support frame which is used for fixedly connecting the purlin; the multiple U-shaped glass plates are disposed on the support frame; the waterproof component is arranged between the support frame and the U-shaped glass plates. Compared with the prior art, the glass roof structure has the advantages that bearing capacity and mechanical strength of the glass roof structure are strengthened through the U-shaped glass plates and the support frame; waterproofing quality of glass roof structure is guaranteed through the waterproof componentwhich is of a multi-layer waterproof structure, will not fail over time and can provide good waterproof effect for the glass roof structure.