The invention relates to metal-welded convex double-vacuum-layer glass with sealing strips, sealing grooves, and a mounting hole. The glass comprises upper glass, lower glass and intermediate glass. The glass is characterized in comprising the mounting hole. The upper glass and the lower glass are convex glass. The intermediate glass is planar glass. Sealing strips are provided at the peripheries of the upper surfaces of the upper glass and the intermediate glass, and at the periphery of the mounting hole, on the upper surfaces of the upper glass and the intermediate glass. Sealing grooves and sealing strips are provided at the peripheries of the upper surfaces of the intermediate glass and lower glass, and at the periphery of the mounting hole, on the upper surface of the intermediate glass and the lower glass. The peripheries of the three pieces of glass are automatically welded together by using a metal solder in a vacuum furnace. The mounting hole is also automatically sealed by using the metal solder. Two sealed vacuum layers are formed between the three pieces of glass. The vacuum glass and the preparation method have simple process. The prepared vacuum glass and tempered vacuum glass are beneficial for mounting and application. Air-tightness of the vacuum glass can be effectively ensured. Strength, thermal insulation performance and sound insulation performance of the glass can be enhanced.