The present disclosure provides a glass assembly, a manufacturing method thereof and a glass window. The glass assembly includes: a first glass plate and a second glass plate disposed opposite to each other, wherein inert gas is filled between the first glass plate and the second glass plate; a first electrode and a second electrode disposed between the first glass plate and the second glass plate, the inert gas is transformed into plasma in the case where an electric field is generated using the first electrode and the second electrode.