An encapsulating structure of an OLED device, comprising an upper substrate and a lower substrate that are disposed in opposition to each other, an OLED device, and a frit wall for sealing peripheries of the upper substrate and the lower substrate; two faces of the upper substrate and the lower substrate that are opposed abut against each other, the lower substrate has a recessed section, which is opened toward the upper substrate and within which the OLED device is positioned; the upper substrate has a first annular groove that is opened toward the lower substrate, the lower substrate has a second annular groove that is opposed to the first annular groove and opened toward the upper substrate, an upper bound of the frit wall is located in the first annular groove, and a lower bound of the frit wall is located in the second annular groove. The encapsulation stability of the encapsulating structure is relatively high, and service life of the OLED device is relatively long.