An OLED device and a packaging method of OLED are provided. The OLED device includes substrate, packaging layer, light-emitting layer, and packaging strip. The light-emitting layer is positioned between substrate and packaging layer. The packaging strip is packaging edge of packaging layer and edge of substrate. The light-emitting layer is enclosed in a space surrounded by substrate, packaging layer and packaging strip. It encloses a space for light-emitting layer by substrate, packaging layer, packaging strip according packaging strip enveloping periphery of upper and lower surface of substrate and packaging layer. Also, positioning sealant between packaging strip and substrate, and between packaging strip and packaging layer, it provides better package effectiveness therebetween. Therefore, it is elongating the path which enters from sealant position to inner of OLED device by moisture, oxygen and so on. It enhances blocking effect of moisture, oxygen in display device, and ensures the lifetime and reliability.