The invention discloses a starry sky atmosphere lamp and an implementation method, which overcome the problems of large using quantity, poor effect and high development cost of atmosphere lamp beads in the prior art. The starry sky atmosphere lamp comprise an atmosphere lamp outer cover, an atmosphere lamp light guide plate, a lamp bead plate assembly, a connecting wire harness, an LED driving assembly and a door plate bracket; the atmosphere lamp outer cover is connected with the atmosphere lamp light guide plate, the LED driving assembly is connected with the lamp bead plate assembly througha connecting wire harness, the atmosphere lamp light guide plate is transparent, a plurality of columns of light guide tooth structures are arranged on the atmosphere lamp light guide plate, an INS light-transmitting membrane is attached to the atmosphere lamp outer cover, and a plurality of patterns are arranged on the INS light-transmitting membrane. According to the invention, the starry sky lamp effect is achieved through combination of the atmosphere lamp light plate and the atmosphere lamp outer cover, light beams sequentially penetrate through the light guide tooth structures and the patterns of the INS light-transmitting membrane, bright spots are formed on the overlapped portions of the patterns and the light guide tooth structures, dark spots are formed on the staggered portionsof the patterns and the light guide teeth, the dark spot brightness is lower than that of the bright spots, and a starry sky effect with alternated light and dark is formed.